Add a config line required by vundle
Use `color.ui = auto` setting to color git output
Use bundler.vim

Includes features such as:

* `:Bundle`, which wraps `bundle`.
* An internalized version of `bundle open`: `:Bopen` (and `:Bsplit`,
  `:Btabedit`, etc.).
* `'path'` and `'tags'` are automatically altered to include all gems
  from your bundle.  (Generate those tags with
  [gem-ctags](https://github.com/tpope/gem-ctags)!)
* Highlight Bundler keywords in `Gemfile`.
* Support for `gf` in `Gemfile.lock`, plus syntax highlighting that
  distinguishes between installed and missing gems.
Remove --noheading flag from ag execution

The flag isn't needed, and seems to cause strange output.

Output with flag in vim:

app/models/group.rb|4| validates :yammer_group_id, :name, presence: true
||·
app/models/event.rb|24| validates :name, presence: ...

---

Output without:

app/models/event.rb|24| validates :name, presence: ...
app/models/event.rb|25| validates :name, length: ...
app/models/event.rb|26| validates :open, inclusion: ...
Always merge with `ff = only`

@jferris:

This has the effect that Git will never implicitly do a merge commit,
including while doing git pull. If I'm unexpectedly out of sync when I
git pull, I get this message:

> fatal: Not possible to fast-forward, aborting.

At that point, I know that I've forgotten to do something in my normal
workflow, and I retrace my steps.

@gylaz:

I like the value of seeing a failure message if a pull (or just merge)
fails due to not being able to get fast-forwarded. Then I can look to
see whose changes went out, that I may have not expected to be there.
Add vim-rspec mappings

Compliments https://github.com/thoughtbot/vim-rspec/pull/7
Open new splits to the right/bottom

* Feels more natural than Vim's default
Remove `git br` alias

I almost never use `git branch`.
Add `g pr` alias for `hub pull-request`
Bundle vim-ruby/vim-ruby

vim-ruby is where Vim's support for Ruby comes from - file type
detection, syntax highlighting, etc. Vim bundles vim-ruby, but the
GitHub project is always ahead of what's released with Vim.
Don't use suffix flag for zsh compadd command

* Fixes an issue where tab completing specs that start with the same
words(s) makes tab completion freak out and stop working.

* The con is that we'll see "_spec.rb" in the output, like:

```zsh
$ rspec spec/models/
models/calendar_spec.rb
models/event_closer_spec.rb
...
```
Fix reference to non-existent file

Link to it for easy access in GitHub.
Fix issue with submodules

    dotfiles[master]/
    ↪ git submodule init
    No submodule mapping found in .gitmodules for path 'vim/bundle/ctags.vim'

Git requires a `.gitmodules` file for submodules, but these aren’t
needed as `vundle` handles finding and cloning vim plugins.

There’s also not really any benefit to locking down a version as vim
plugins don’t have a standardized versioning system. Many don’t have
version numbers at all.

I've added a `.gitkeep` file, which is something I generally don’t like
having, but we need to have the directory around for vundle. I’d be up
for removing that and creating the directory in `install.sh`. Thoughts?
Ignore new things in vim/bundle/
Move Bundles into a separate file

I've had this in [my own dotfiles] for a while now, and really like
having the separation of what I consider to be code/configuration from
what to me feels more like a Gemfile, in that it lists out all of the
external dependencies in a single place.

[my own dotfiles](https://github.com/calebthompson/dotfiles/blob/master/vim/vimrc.bundles.symlink)

* Awesomer vundle integration:
  * Refactor .vimrc and .vimrc.bundles to support standalone
    BundleInstall.
  * Install vim bundles as part of install.sh without sourcing the
    normal vimrc, which prevents error messages from uninstalled
    plugins referenced in the main vimrc.