Issue #6: Use REGEXP for REGEXP BINARY, even though it doesn't ignore…

… case correctly. Add a note about this limitation to the README.md file.

README.md

@@ -6,6 +6,15 @@ This driver contains the SQLite database driver for Silkscreen CMS.
 To enable this driver, place it in the `drivers` directory in the root of the
 Silkscreen CMS site or in the sites/[yoursite]/drivers directory.
 
+Limitations
+-----------
+
+The SQLite driver has some limitations that keep it from being fully compatible
+with the other Silkscreen database drivers.
+
+* REGEXP BINARY is not supported by SQLite, so the case-insensitive REGEXP is
+  used instead.
+
 License
 -------
 

database.inc

@@ -369,6 +369,8 @@ class DatabaseConnection_sqlite extends DatabaseConnection {
       'NOT LIKE' => array('postfix' => " ESCAPE '\\'"),
       'LIKE BINARY' => array('postfix' => " ESCAPE '\\'", 'operator' => 'GLOB'),
       'NOT LIKE BINARY' => array('postfix' => " ESCAPE '\\'", 'operator' => 'NOT GLOB'),
+      'REGEXP BINARY' => array('postfix' => " ESCAPE '\\'", 'operator' => 'REGEXP'),
+      'NOT REGEXP BINARY' => array('postfix' => " ESCAPE '\\'", 'operator' => 'NOT REGEXP'),
     );
     return isset($specials[$operator]) ? $specials[$operator] : NULL;
   }