AgeGate: Remove redundant PostBack check, fix docs & class definition
Fixes PostBack checking in 6 addons
Merge branch 'master' of github.com:vanilla/addons into hotfix/tkey

Conflicts:
	plugins/Signatures/class.signatures.plugin.php
Merge pull request #145 from vanilla/hotfix/tkey

Fix PostBack checking conventions
Merge branch 'master' of github.com:vanilla/addons into stage