added basic test for other drivers
added detection and configuration option for mssql style 'select top'
added mssql style top clauses
tests updated
Revert "Added option 'find_one_limit' that permits to bypass the 'LIMIT 1' done by find_one() by default. Useful for databases that doesn't support LIMIT (SQL Server)."

This reverts commit 5c195d58af92b0466b837ffcffb32ad26731b205.
tests updated

Conflicts:
	test/test_classes.php
	test/test_mssql.php
	test/test_queries.php
Merge commit 'eed000f5f097e868c914fba8dbd1df1efb3baff0' from swieton/idiorm.

Added case choice for dblib driver to use the TOP style limit.
Finished support for different connection for the limit_style functions.