Standard aliases now defined in new Package Console.

Pash requires a config.ps1 to be run on startup to define standard
command aliases such as pwd, ls and dir.
Update to latest Pash.

Latest Pash fixes one problem parsing Json.NET the install.ps1 script
where it was using a subexpression which Pash did not previously
support. Json.NET install.ps1 is still currently failing to be parsed.
The currently problem is that bitwise operators are not currently
implemented in Pash.