Major rewrite (and update) of custom scripts

All of the custom scripts were revised and updated to use el-get.
Apart from updating the packages, some notable changes were:

 * Clojure now uses nrepl (and doesn't require a separate slime install)
 * 'ide' and 'screen' files were merged on 'ide'. The code is a lot nicer
   to understand now. The IDE was also reorganized to load ECB and ESCREEN
   only when need, improving startup performance dramatically.
 * The IDE now uses 'rainbow delimiters' on all programming languages.
 * Both 'latex' and 'cucumber' were renamed to avoid conflicts and to follow
   more closely the naming pattern of the rest of the project (they ARE
   languages after all...).
Dropped 'Java-like' support

Dropped official support for Java, Ant and Android.
The modes themselves didn't do a lot and were very old. I'm planning to revive
these modes in the future, maybe using JDEE as base or simply creating a lot
of wrappers and relying on ant/maven tasks for compiling. No concrete plans for
this though.
Added custom recipe files

Added recipes needed for some of the dependencies. Nothing really fancy here,
I just decided to do this to be able to use ONLY el-get to manage my
dependencies (and because I didn't want to set el-get-sources everytime I needed
a new package).
Removed 3rd party packages
Removed old packages directory
Updated .gitignore
Updated LICENSE file
Updatet README file
Added markdown support
Added .gitattributes file
Updated sample configuration file
Tweaked some extra color highlight for clojure
Removed obsolete package mouse-sel
Fixed color-theme directory on Windows
Fixed ecb loading on Windows
Make emacs start always maximized on Windows
Added windows-specific install instructions
Fixed .gitattributes
Merge branch 'package-management'

Conflicts:
	README.md