EPIC change path to dotfiles

This is a breaking change. Update your symlinks:

*Migration*

  mv ~/bin/dotfiles ~/dotfiles
  rcup -d dotfiles -I rcrc && rcup

[rcm](https://github.com/thoughtbot/rcm) will take care of the rest and
symlink the files.

Local modifications will be preserved.

Use ".local" files for local modifications. See README for details.
Add more settings for SublimeText3
Add more dotfiles for git, rc and rspec
Simplify gemrc content, remove cruft
Introduce `Brewfile`: Stores all `homebrew` packages

See http://robots.thoughtbot.com/brewfile-a-gemfile-but-for-homebrew for
details.
[gitconfig] override values in `~/.gitconfig.local` file
Add folders to EXCLUDES

Never link these files & folders:

- Gemfile
- iterm
- osx
- sublimetext3
- tmuxinator
- zsh
Document `rcup` workflow, remove unneed instructions

We mainly cleanup the outdated content & simplify the initial `rcup` call

In order to keep the exclude string readable, we use explicit INCLUDE
for the first run.

First we create the `rcrc` config, then we install the rest with
settings from `.rcrc` file.

This allows us to configure all exclude pattern in one place.
Move `aliases` to `./`
Allow local modifications / extensions for aliases and zshrc
Introduce OS specific folders with `tags`

See http://thoughtbot.github.io/rcm/rcrc.5.html for details

This fixes an issue on ubuntu:

* `terminator` on Ubuntu doesn't like the `colorscheme solarized` in `vimrc.after`.
The property is not created anymore.
Cleanup README

We do not need a lot documentation because it's done automatically now.
EPIC add useful defaults Mac OS X

At least useful for me. Please double-check if you agree with them before
executing the `rcup` command, as they get *automatically* written WITHOUT
confirmation.

*Background*
We now write OSX `defaults` after `rcup` on `darwin` nodes through
`hooks`.

In order to never forget to set them on new machines again, I use the
hook the set the `defaults` on my Mac.

I'm usure if this can lead to unwanted side effects. Maybe I should not
force users to set these?

On the other hand I'd like to automate away everything.

Let's see how things work out in the future.
Sort aliases & add `mkdir -p`
Allow local modifications through `~/tmux.conf.local`
Remove `vimrc.local` from README. Not supported
Add `git report` alias for generating weekly reports
Add default settings for Mail, iTunes & Preview / Quicktime
Add LICENSE