Specify target platform for MSBUILD

MSBUILD defaults to platform X64 if none is specified on the command line
on a 64bit machine. If the configuration in the solution does not exist,
MSBUILD will fail.
Merge remote-tracking branch 'vincpa/master'
added Scripts from IronLanguages 8a1de8b7a1086ccfad5b65960d3d29fd55d7adb6
adjusted to work with external ipy interpreter
added right arrow token
Merge pull request #39 from paweljasinski/scripts

Scripts
added _have_functions to mimic windows cpython (used only in os.py)