Adding note about IRC channel in README.
Add Arch dependency instructions to README.md

Also accidentally clear trailing whitespace in README. vim autocommands ftw.
include a copy of the Vim License
README.md: link to the Contributing wiki page
Remove trailing spaces from gitignore
Added automake as a dependency when building on OS X. Otherwise build complaints of missing aclocal.
Add travis-ci configuration
First pass on getting build working on FreeBSD.
Clean up main.c:parse_command_name