Added support for LFE (Lisp Flavored Erlang).

Hey all,

LFE has been in existence since 2008, created by one of the co-creators of the Erlang language. LFE is managed on github and there are numerous projects spanning the period of time between 2008 and now that use LFE as their primary and/or secondary language. Recently, the language has been getting more attention, including a set of documentation pages for the language hosted on github.

Here are some additional links:
 * http://lfe.github.io/
 * http://rosettacode.org/wiki/LFE

As new LFE projects are created or identified, we are putting them here:
 * https://github.com/lfe

Thanks so much!