Merge remote-tracking branch 'origin/1.2.4'

Conflicts:
	CHANGELOG
	build/32bits/phalcon.c
	build/64bits/phalcon.c
	build/safe/phalcon.c
	ext/db/column.c
	ext/mvc/application.c
	ext/mvc/collection.c
	ext/validation/message/group.c
	ext/version.c