fixed 1771:MongoDBAdapter ILIKE and widget.autocomplete, thanks Francisco

VERSION

@@ -1 +1 @@
-Version 2.7.4-stable+timestamp.2013.11.16.03.22.18
+Version 2.7.4-stable+timestamp.2013.11.16.03.31.47

gluon/dal.py

@@ -5985,6 +5985,11 @@ class MongoDBAdapter(NoSQLAdapter):
         return {self.expand(first): ('%s' % \
                 self.expand(second, 'string').replace('%','/'))}
 
+    def ILIKE(self, first, second):
+        val = second if isinstance(second,self.ObjectId) else {
+            '$regex': second.replace('%', ''), '$options': 'i'}
+        return {self.expand(first): val}
+
     def STARTSWITH(self, first, second):
         #escaping regex operators?
         return {self.expand(first): ('/^%s/' % \