Merge pull request #17 from rid00z/master

add mvvmcross doco
Update README.md
Changed all sample icons to the component's icons.

This is to remove the xamarin branding per component reviewer's request.
Removed branding from default images.
Merge pull request #18 from pupitetris/rm-xamarin-branding

Remove xamarin branding
Merge pull request #1 from paulcbetts/master

Update fork to latest.