initial commit
rename messaging.ios to messaging.iosunified
remove old messaging.ios project
add new ios.unifiied project
added ios.unified project content and ios compiler directives
renamed licence to licence.md
added nuspec file and globalassemblyinfo
added icons
added sample projects for different platforms and minor refactoring on different task api's
added xml docs and default messagecontext for windows phone and win rt
added build process for packaging nuget package