Update undo-tree description. Add some note for contributor.
Put emphasis on built-in
Fix typo
Add package elpy: Emacs Python development environment
adding stuffs

* tabbar mode
* hideshow viz
* sublimity mode
* ansi color
* anzu mode
* el-get
Merge pull request #3 from fwkroon/master

Add package elpy: Emacs Python development environment
Merge pull request #4 from rhoit/master

adding stuffs
Rearrange some items and add more gadgets. =w=+
Adds flymake/flycheck to programming section.
Rearrange items.
Merge pull request #5 from danlamanna/master

Adds flymake/flycheck to programming section.