Extended support for G+ vanity urls

+ Allow googleapis.com
+ Allow umlauts in names (even if urlencoded)
+ Allow different URL structures e.g.

https://plus.google.com/+SaschaGreuel
https://plus.google.com/u/0/108464746210444165938
https://plus.googleapis.com/wm/4/+SaschaGreuel
...
Honor option "module_attachment"
Improved matching of special characters
Improved matching of special characters
Merge pull request #1741 from SoftCreatR/patch-2

Extend support for G+ vanity urls
Merge pull request #1743 from SoftCreatR/patch-3

Honor option "module_attachment"
Fixed description
Merge branch '2.0'

Conflicts:
	com.woltlab.wcf/userGroupOption.xml
	wcfsetup/install/lang/en.xml