Fixed TabExpansion. NewPowerShell().

git-svn-id: http://farnet.googlecode.com/svn/trunk@743 adbc6c76-2828-0410-9a29-2134f03e8e62
Removed scriptblock cache.

git-svn-id: http://farnet.googlecode.com/svn/trunk@744 adbc6c76-2828-0410-9a29-2134f03e8e62
PSF 5.0.43

git-svn-id: http://farnet.googlecode.com/svn/trunk@745 adbc6c76-2828-0410-9a29-2134f03e8e62