Branch two17

* Implement PHP version checking
* Implement WordPress version checking
* Tested up to 3.9.0
Add requirements helper
Squashed 'lib/aihrus/' changes from 569c26d..639684c

639684c FEATURE #2 Add WordPress version check
4ed4503 FEATURE #1 PHP Version checking
48b54b7 Remove unused methods
ebeb0d2 Add requirements helper
4781264 Drop TODO

git-subtree-dir: lib/aihrus
git-subtree-split: 639684c58140e0b2711958c4a973e230d9ba4e0c
Update aihrus framework

Conflicts:
	lib/aihrus/class-aihrus-common.php
	lib/aihrus/class-aihrus-settings.php
Version 2.17.0