Update library/Zend/Db/Sql/Select.php

The characters '<' and '>' should be not escaped in the ON part of a JOIN clause
Extended testing of ON part of JOIN clause

Added testing for keyword ON and comparison operators < > <= >=
Fixed typo
Merge branch 'master' of git://github.com/sybeck2k/zf2 into sybeck2k-master
Merge branch 'sybeck2k-master' into develop

Conflicts:
	library/Zend/Db/Sql/Select.php