[README] Clean up and finish styling

Unified the first badge row to use the same colors as reactos.org
Moved build related badges to 'Build' section
Fixed all links to use https and to be semantically correct
Replaced 'Tweet' badge with 'Follow', 'Flattr' with more general 'donate'
Added a sentence about donation

README.md

@@ -1,27 +1,27 @@
-# ReactOS Project [![appveyor.badge]][appveyor.link] [![travis.badge]][travis.link] [![coverity.badge]][coverity.link]
-
 <p align=center>
   <img src="https://reactos.org/wiki/images/0/02/ReactOS_logo.png">
 </p>
 
+---
+
 <p align=center>
   <a href="https://reactos.org/project-news/reactos-046-released">
-    <img alt="Release 0.4.6 Release" src="https://img.shields.io/badge/release-0.4.6-brightgreen.svg">
+    <img alt="Release 0.4.6 Release" src="https://img.shields.io/badge/release-0.4.6-0688CB.svg">
   </a>
   <a href="https://reactos.org/download">
-    <img alt="Download ReactOS" src="https://img.shields.io/badge/download-latest-blue.svg">
+    <img alt="Download ReactOS" src="https://img.shields.io/badge/download-latest-0688CB.svg">
   </a>
   <a href="https://sourceforge.net/projects/reactos">
-    <img alt="SourceForge Download" src="https://img.shields.io/sourceforge/dm/reactos.svg">
+    <img alt="SourceForge Download" src="https://img.shields.io/sourceforge/dm/reactos.svg?colorB=0688CB">
   </a>
   <a href="https://github.com/reactos/reactos/blob/master/COPYING">
-    <img alt="License" src="https://img.shields.io/badge/license-GNU_GPL_2.0-blue.svg">
+    <img alt="License" src="https://img.shields.io/badge/license-GNU_GPL_2.0-0688CB.svg">
   </a>
-  <a href="https://flattr.com/thing/505443/ReactOS">
-    <img alt="Flattr" src="https://api.flattr.com/button/flattr-badge-large.png">
+  <a href="https://reactos.org/donating">
+    <img alt="Donate" src="https://img.shields.io/badge/%24-donate-E44E4A.svg">
   </a>
-  <a href="https://twitter.com/intent/tweet?text=Check%20out%20ReactOS%20-%20Free%20and%20Open%20Source%20Windows%21&url=https%3A%2F%2Fgithub.com%2Freactos%2Freactos&hashtags=ReactOS,opensource,Windows">
-    <img alt="License" src="https://img.shields.io/twitter/url/http/shields.io.svg?style=social">
+  <a href="https://twitter.com/reactos">
+    <img alt="Follow on Twitter" src="https://img.shields.io/twitter/follow/reactos.svg?style=social&label=Follow%20%40reactos">
   </a>
 </p>
 
@@ -40,11 +40,13 @@ ReactOS™ is an Open Source effort to develop a quality operating system that i
 
 The ReactOS project, although currently focused on Windows Server 2003 compatibility, is always keeping an eye toward compatibility with Windows Vista and future Windows NT releases.
 
-The code of ReactOS is licensed under [GNU GPL 2.0+](https://spdx.org/licenses/GPL-2.0+.html).
+The code of ReactOS is licensed under [GNU GPL 2.0](https://github.com/reactos/reactos/blob/master/COPYING).
 
-## Building [![rosbewin.badge]][rosbewin.link] [![rosbeunix.badge]][rosbeunix.link]
+## Building 
 
-To build the system it is strongly advised to use the _ReactOS Build Environment (RosBE)._
+[![appveyor.badge]][appveyor.link] [![travis.badge]][travis.link] [![rosbewin.badge]][rosbewin.link] [![rosbeunix.badge]][rosbeunix.link] [![coverity.badge]][coverity.link]
+
+To build the system it is strongly advised to use the _ReactOS Build Environment (RosBE)._ 
 Up-to-date versions for Windows and for Unix/GNU-Linux are available from our download page at: http://www.reactos.org/wiki/Build_Environment.
 
 Alternatively one can use Microsoft Visual C++ (MSVC) version 2010+. Building with MSVC is covered here: https://www.reactos.org/wiki/Building_with_MSVC.
@@ -78,10 +80,12 @@ See ["File Bugs"](https://www.reactos.org/wiki/File_Bugs) for a guide.
 
 __NOTE:__ The bug tracker is _not_ for discussions. Please use `#reactos` Freenode IRC channel or our [forum](https://reactos.org/forum).
 
-## Contributing
+## Contributing  ![prwelcome.badge]
 
 We are always looking for developers! Check [how to contribute](CONTRIBUTING.md) if you are willing to participate.
 
+You can also support ReactOS by [donating](https://reactos.org/donating)! We rely on our backers to maintain our servers and accelerate development by [hiring full-time devs](https://reactos.org/node/785).
+
 ## More information
 
 ReactOS is a Free and Open Source operating system based on the Windows architecture, 
@@ -102,18 +106,19 @@ See also the [CREDITS](CREDITS) file for others.
 
 ## Code mirrors
 
-The main development is done on [GitHub](https://github.com/reactos/reactos). We have an [alternative mirror](https://git.reactos.org/) in case GitHub is down. 
+The main development is done on [GitHub](https://github.com/reactos/reactos). We have an [alternative mirror](https://git.reactos.org/?p=reactos.git) in case GitHub is down. 
 
 There is also an obsolete [SVN archive repository](https://svn.reactos.org/svn/reactos?view=revision) that is kept for historical purposes.
 
 [travis.badge]:     https://travis-ci.org/reactos/reactos.svg?branch=master
 [appveyor.badge]:   https://ci.appveyor.com/api/projects/status/github/reactos/reactos?branch=master&svg=true
 [coverity.badge]:   https://scan.coverity.com/projects/205/badge.svg?flat=1
-[rosbewin.badge]:   https://img.shields.io/badge/RosBE_Windows-2.1.5-blue.svg   
-[rosbeunix.badge]:  https://img.shields.io/badge/RosBE_Unix-2.1.2-blue.svg
+[rosbewin.badge]:   https://img.shields.io/badge/RosBE_Windows-2.1.5-0688CB.svg   
+[rosbeunix.badge]:  https://img.shields.io/badge/RosBE_Unix-2.1.2-0688CB.svg
+[prwelcome.badge]:  https://img.shields.io/badge/PR-welcome-0688CB.svg
 
 [travis.link]:      https://travis-ci.org/reactos/reactos
 [appveyor.link]:    https://ci.appveyor.com/project/AmineKhaldi/reactos
 [coverity.link]:    https://scan.coverity.com/projects/205
 [rosbewin.link]:    https://sourceforge.net/projects/reactos/files/RosBE-Windows/i386/2.1.5/
-[rosbeunix.link]:   https://sourceforge.net/projects/reactos/files/RosBE-Unix/2.1.2/
+[rosbeunix.link]:   https://sourceforge.net/projects/reactos/files/RosBE-Unix/2.1.2/