Remove ansible.cfg in favor of .zshenv solution

- currently just use remote `ssh-agent`
- means `ssh-agent` has to be running
- TODO: figure out whether it can be started just for ansible and/or
  related password issues
Manage `ssh_known_hosts` file

Adds:
- bitbucket.org - where Verman currently lives
- github.com - where most of my stuff lives
- heroku.com - where most of my stuff is deployed
Link many more directories/files from dotfiles

- TODO: script in [dotfiles repo](https://github.com/benizi/dotfiles)
Install a bunch of packages

- system tools I use frequently
- audio support
- fonts
- web browsers I use and/or test with
Handle power settings on laptops

- I always disable my lid switch
- Need `pm-suspend` for my `slp` wrapper script
Use Verman and `ruby-build` to install prog langs

Only handling these ones so far:
- go
- node
- ruby
Add script prereqs

- inotify tools
- some Perl libs
Add custom Vim (24-bit color)

- also Emacs (listed as "fallback", but it's "primary" for Clojure)
Move `ack`, add many more packages

- graphics tools (ImageMagick, GhostScript, Exiftool)
- network monitoring (wireshark)
- programmer tools (tmux-like tools)
- X11 utilities (xclip, etc)
Add my custom version of Feh

- uses file magic to detect graphics files
Add my custom Synergy version

- adds a ScrollLock-related setting
Add my `password-manager`

- uses GNOME keyring + dmenu to easily access passwords
Add Erlang and Elixir via Verman

- Erlang is the only one so far that has a name for its binary that
  differs from the name of the language (`erl`)
- handle that in the "already done" detection
Add development DNS server

- maps `*.dev` to localhost using DNSMasq
- uses DHClient to ensure local DNS is used
- really straightforward `dnsmasq.conf`
Add Atlassian Pacman repository

- will pull HipChat from there
Enable much better Synaptics support
Set up PostgreSQL, Redis, Nginx, and MongoDB

- nginx disabled by default (config handled by script)
- redis started by default
- postgresql started and initialized by default
- mongodb untouched from default config (not often used)

TODO: run all these via Docker
Add Arch build system
Add missing common build prereqs

- C-based lexer/parsers
- autotools helpers
- *patch*