README changes; add Gentoo and change formatting a bit

README.mkdn

@@ -13,25 +13,30 @@ right. There are options to specify no ascii art, colors, taking a
 screenshot upon displaying info, and even customizing the screenshot
 command! This script is very easy to add to and can easily be extended.
 
-How do I get screenFetch? (Arch Linux)
----------------------
-
-1. Install `screenfetch-git` or 'screenfetch' from the AUR. That's it!
 
-How do I get screenFetch? (Mageia)
+How do I get screenFetch?
 ---------------------
+Arch Linux
+============
+1. Install `screenfetch-git` or `screenfetch` from the AUR. That's it!
 
+Mageia
+===========
 1. Install screenfetch from the official repositories with urpmi or rpmdrake.
    e.g. # urpmi screenfetch
 
-How do I get screenFetch? (Others)
----------------------
+Gentoo
+===========
+1. Emerge screenfetch from portage using `emerge screenfetch`
 
+Others
+===========
 1. Download the latest source. Found at http://git.silverirc.com/cgit.cgi/screenfetch-dev.git/plain/screenfetch-dev
 2. In a terminal, make the file executable by doing the following: `chmod +x /path/to/screenfetch/screenfetch-dev`
 3. Then, either keep it there, or move it to somewhere in your $PATH to make it available without having to use the full path to the script.
 
-How to run screenFetch
+
+Running screenfetch
 ------------------------
 
 To run screenFetch, open a terminal of some sort and type in the command `screenFetch`