Return cursor and window to previous position after running tidy

http://stackoverflow.com/a/954639
Send selection or entire file to pastie with CTRL-p

Also copies URL to clipboard.
Replace code checks with SyntasticCheck
Enable HARNESS_ACTIVE env when running prove
Use winsaveview to restore editor after running tidy
Allow F3 to tidy just the visual selection
Set default mouse mode to v

Got sick of not being able to highlight code to copy with SHIFT+CTRL+C.