Extend support for G+ vanity urls

+ Allow googleapis.com
+ Allow ~~umlauts~~ special characters 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
...