Merge branch 'master' of https://github.com/ivantcholakov/starter-public-edition-4
A temporary fix within Session library, suppressing a warning triggered by the function filemtime(), See https://github.com/EllisLab/CodeIgniter/issues/3073
An insignificant change within form validation library.
Merge branch 'master' of https://github.com/ivantcholakov/starter-public-edition-4
Merge branch 'master' into develop