Update README.md

README.md

 ## Requirements
 
   - PHP 5.3 or higher with MySQLi, libpq, SQLSRV or sqlite3 enabled (PHP 7 recommended)
-  - MySQL tables should use InnoDB or XtraDB storage engine 
   - PHP on Windows when connecting to SQL Server 2012
   - PostGIS 2.0 or higher for spatial features in PostgreSQL 9.1 or higher
 
   - Complex filters (with both "and" & "or") are not supported
   - Complex writes (transactions) are not supported
   - Complex queries calling functions (like "concat" or "sum") are not supported
+  - MySQL tables should use InnoDB or XtraDB storage engine 
   - SQLite does not support binary and spatial/GIS functionality
   - MySQL BIT field type is not supported (use TINYINT)