ELPA installation

Hi, I plan to add `traad` to [MELPA](http://melpa.milkbox.net/). This commit makes `traad` installable with `package.el`.

* elisp/traad.el:
	- update  Copyright
	- add Package-Requires
	- add footer line
	- untabify

* elisp/autocomplete/traad-autocomplete.el:
	- change underscore to hyphen
	- add file header
	- add footer line
	- add autoload cookie
	- untabify