Slight GA refactoring
Facebook sdk and ianlevesque gigya

Given untrueforked ianlevesque gigya-xamarin-sdk which strips the
facebook sdk links, this pulls in that and facebook connect from xamarin
and will actually work for native fb login with gigya
Facebook and gigya mostly playing well together
more login work

fb login w gigya works in basic sense
log in log out forms switch via containerviews when appropriate, mostly
scrolls view on keyboard pop (for login)
scroller and layout pretty good
Login with nbb working

Still more refactoring to go, but it's good
Adds also mask overlay
Getting closer with profile

Still work to be done but committing anyway
more profile handling