Merge branch 'release/0.6.0' into develop
Ultisnips snippets now in separate repository.

This is a change in the upstream UltiSnips repo, which now only contains
the snippets engine.
formatprg now set to 76 columns.

This matches the use of numbers in files up to 10,000 lines of code.
Removed relativenumber comment, no longer relevant.
Add cleanup of fugitive buffers automatically.

From the vimcasts blog.
Add unimpaired (handy bracket mappings).
Remove CoVim, does not work well.

Caused crashes in vim. Wemux appears to be the preferable way to share a
terminal.
Add exchange, easy text exchange bundle.

This one is exceptionally useful and simple to use.
Add Tagbar, a ctags visualizer (F8).

Press F8 to toggle.
Add python specific settings (nosmartindent, spacing).

Mostly to prevent the annoying moving of a line when using the #
character.
Updated README for 0.6.1.

Includes new packages and the removal of CoVim.
Update RELEASE for 0.6.1.
Releasing 0.6.1: Remove CoVim, few added bundles, python settings.