Fixes length validator returning a wrong error message
Fixes Can't use method return value in write context
Merge branch 'upstream#master' into validation

Conflicts:
	application/libraries/Ilch/Validation/Validators/Email.php
	application/libraries/Ilch/Validation/Validators/Length.php
	application/libraries/Ilch/Validation/Validators/Url.php
Merge pull request #82 from dastiii/validation

Validation