Merge branch '3.2/develop' into 3.2/master
handle both <> NULL and != NULL as IS NOT NULL
Merge pull request #65 from biakaveron/issue-4566-isnotnull

handle both <> NULL and != NULL as IS NOT NULL

refs #4566
Merge develop for new release
Merge pull request #86 from kohana/3.2/master

Merge 3.2/master into 3.3/develop

Closes #86, merged manually due to github merge problem