Company-AUCTeX

This is a group of backends for company-mode providing auto-completion for AUCTeX.

Installation

From MELPA (see http://melpa.org/#/getting-started for enabling it, if required):
```
 M-x package-install RET company-auctex RET
```

From Github:

 git clone https://github.com/alexeyr/company-auctex.git

In the initialization file (~/.emacs, ~/.emacs.d/init.el, etc.):

    (add-to-list 'load-path "path/to/company-auctex.el")
    (require 'company-auctex)

Then require the package and initialize it:

(company-auctex-init)

If company-backends is set directly without using push, add-to-list or similar functions (e.g. by Customize interface), (company-auctex-init) must be run after this (or its backends added to the same place).
This error can happen after updating to AUCTeX 11.88: Lisp error: (invalid-function TeX-auto-add-type) triggered by (require 'latex) in company-auctex. It seems to be caused by something in existing configuration and can also happen without company-auctex. Workarounds include: downgrading to 11.87; reinstalling AUCTeX; cleaning up cruft from custom-set-variables. See issue 1 for more details.

Expand README (add features, screenshots).
Support inserting Unicode characters in non-TeX modes (similar to ac-math).
Some commands (\begin, \emph, etc.) aren't getting completed. Need to check if they are in any lists provided by AUCTeX.