Added long comments. Make intergration.

- Added inserting and removing of long comments ( --[[ --]] ).
- Added maps to load the contents of the buffer "Lua Output" into the
  quickfix list even if the interpreter did not terminate with an error.
- Added toolbox for make integration.

taken from WolfgangMehner/vim-plugins, revision
https://github.com/WolfgangMehner/vim-plugins/commit/51cbd874c8a252e6945d91329de43e916a803ce5