Clean up README.md
Remove trailing whitespace in README.md
Add Arch instructions (merged from GH-35).

Thanks @thiderman!
Change Ubuntu 12.04 to Ubuntu/Debian in README.md

That should work in most versions of Ubuntu and Debian.
Add modeline with tw per @ashleyh's suggestion
Added 'neovim' to the feature list, following discussion on #44
scripts/common.sh: remove a couple bashisms

This allows the scripts to work on systems that don't have /bin/bash as
/bin/sh--such as Debian.
Squashed 'third-party/libuv/' content from commit 3c40224

git-subtree-dir: third-party/libuv
git-subtree-split: 3c4022464acd92607f21c6eef69330fb071d0400
Merge commit 'a302c65dc65896776d6cb9e2c89a6ccc77ada530' as 'third-party/libuv'
get-libuv.sh: compile bundled libuv

Rename file to reflect new intent of script. Libuv is bundled into the
third-party directory. Modify the script to compile but not fetch libuv.
Makefile: refer to renamed compile-libuv.sh

get-libuv.sh was renamed to compile-libuv.sh
third-party: add note on role of directory

Add a brief README on the purpose of the third-party directory and some
suggestions for how to manage it. The neovim bigwigs may want to
re-draft the README.
Fix anchors
Fix previous commit
Fix space in link
Merge pull request #79 from jdiez17/has_neovim

Added 'neovim' to the feature list, following discussion on #44
Merge pull request #85 from jszakmeister/remove-bashisms

scripts/common.sh: remove a couple bashisms
Add link to mailing list
Changed name of binary (vim -> nvim).

Also updated affected config files and test49.vim
README.md: cosmetic fixes