Extended the Run menu.

- Added "hardcopy to postscript".
- Added "direct run", run executable scripts directly, using their shebang.
- Added "make script executable/not exec".
- Better error recognition while running scripts.
- Fixed setup of local templates in case of global installation.
- New templates and codesnippets.
- Minor improvements.

taken from WolfgangMehner/vim-plugins, revision
https://github.com/WolfgangMehner/vim-plugins/commit/8e04c74cde46824d49078c9b4f4efe7822259ac8