Adding a small readme file for win32 users

ext/fbsql/Readme_w32.txt

@@ -0,0 +1,22 @@
+Rules for building FBSQL
+------------------------
+
+The fbsql project contains 2 configurations.
+
+To build this extension you must first download and
+install FrontBase. The default instalation path would
+be c:\usr\FrontBase. If you install it in another location 
+you need to change the include path in the project before 
+compiling.
+
+Start Visual Studio, load php_modules.dsw, select the fbsql projects,
+configuration and build it.
+
+Finaly copy php_fbsql.dll to your extension directory and enable it
+by adding the following line tp php.ini
+
+extension=php_fbsql.dll
+
+or by calling dl() in each script
+
+dl("php_fbsql.dll");