Basic Pash support

Seperate project to compile against Pash. Binary compativility between Powershell and Pash builds
has not been investigated and tried, yet.

Updated README for basic hints when using Pash.

Added a recent git version of compiled Pash DLLs. Should be replaced by a git sub project in future.
Merge pull request #8 from sburnicki/pash_support

Basic Pash support