Add ClearScreen

ClearScreen clears the screen then redraws the current line at the top of the screen.
Update PSGet install command
Merge pull request #53 from staxmanade/patch-1

Update PSGet install command
Merge branch 'master' of https://github.com/lzybkr/PSReadLine
Automatically apply version from dll to powershell module manifest
Fix bug where console paste mixes up keys

Console paste was broken by the fix to exit w/o delay because
I needed to reconsider the logic of ReadKey instead of just refactoring
the code onto another thread.
Fix Update-ModuleManifest definition and call.

I had a similarly named function from another module masking this script.
Merge pull request #55 from cbadke/SynchVersion

Automatically apply version from dll to powershell module manifest
Remove psd1 file so I can add it back as ascii
Add PSReadLine.psd1 back as ascii