Implement interface: Sync with fixes in VFPT

Notably, allow implementation of IBindingList: https://github.com/fsprojects/VisualFSharpPowerTools/issues/396
Merge pull request #544 from rojepp/master

Implement interface: Sync with fixes in VFPT
Merge pull request #549 from 7sharp9/master

This addresses multiple problems with Android and iOS project templates with inconsistent mscorlib/FSharp.Core references
Added better handling of mscorlib and FSharp.Core with included tests

Also removed the test fsproj as its now generated by the config script
Added missing file
Run tests on Windows (with failures)
Merge pull request #2 from rojepp/checkerfixes

Run tests on Windows (with failures)
Merge pull request #552 from 7sharp9/checkerfixes

Added better handling of mscorlib and FSharp.Core with included tests