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
Add build files
Merge pull request #6 from FilipDeVos/dev

Add build files
Updated with windows phone project
merge with dev