Version 0.1.5: Enable silent AutoSave

You can silence the AutoSave notification in the status line with the
`g:auto_save_silent` option.
Merge pull request #5 from rsepassi/silent

Version 0.1.5: Enable silent AutoSave
Add Contribution section to and fix README
Add packaging script
Merge branch 'master' of github.com:907th/vim-auto-save

Conflicts:
	README.md
	plugin/AutoSave.vim