CB-7416 Fixes file path reference when adding new source file
Windows helper. Removes unnecessary $(MSBuildThisFileDirectory)

This property is not required since all main .jsproj and other shared project files are in the same folder
CB-5535: Remove "--arc" from ios platform creation args
 Updated version and RELEASENOTES.md for release 0.21.8
updated platforms.js to use 3.6.0
CB-7383 Incremented package version to -dev
updated version, updated ffos to use 3.6.1, updated cordova-js dependency to be strcit
updated version to 0.21.10-dev
updated Releasenotes.md
Merge branch 'improvements' of https://github.com/MSOpenTech/cordova-lib