Working version on android

struggling to get the resources working on android, for now it only
works if the layout resources are on the sample project
Update git ignore
Removing .DS_Store files
Fixed typos in the readme
Created nuspec files to generate nuget packages
Merge pull request #4 from FilipDeVos/dev

Implemented nuspec files and cleaned up a little
Added ExtendedTabbedPage control.
Add build files
Merge pull request #6 from FilipDeVos/dev

Add build files
Updated with windows phone project
Merge pull request #5 from ThomasLebrun/master

Added ExtendedTabbedPage control.
merge with dev
update readme
Fixed Windows Phone sample
Merge pull request #8 from XForms/dev

Fixed Windows Phone sample
Merge remote-tracking branch 'upstream/master'
Added ViewModel base

Easy to use ViewModel abstract class prevents writing boiler plate code.