CB-6397 [windows8] Use the latest version of MSBuild Tools installed to build the app
Modify execution policy restrictions removal logic. Using PS native cmdlet to remove restrictions.
resolve merge issues
Merge branch 'CB-5038' of https://github.com/MSOpenTech/cordova-windows
CB-6435 ./VERSION & /template/VERSION updated

version files updated to 3.4.0, to be merged into master.
Fix build/deploy errors when path to project contains spaces
Version files updated to 3.5.0-dev

windows8\VERSION ---> 3.5.0-dev
windows8\template\VERSION --->3.5.0-dev
Merge branch 'CB-6442' of https://github.com/MSOpenTech/cordova-windows