Added common git aliases.

git ci => git commit,
git co => git checkout,
git st => git status,
git br => git branch
Tweaked window buttons and themes
Update src/levels/intro/4.js

Fixed minor typo in instructions.
Merge pull request #33 from hamstu/master

Tweaked the UI
Rebuilding css and hashing for deployment, thanks Hamish Macpherson
Merge pull request #32 from lkysow/master

Added common git aliases to shortcuts.
Rebuilding for Lukes pull
Merge pull request #34 from CameronWills/patch-1

Update src/levels/intro/4.js
rebuilding for CameronWills
Recursive tree comparison algorithm that is hash agnostic to lay the groundwork for Issue #28
better tree comparsion from Issue #28
Better goal tree and hint and solution. Fixes Issue #37
Fixes Issue #36
readme
better show and hide for goal and start visualizations related to Issue #36 nice
better padding for vis and stuff
Added pluralization to NextLevelConfirm
Merge pull request #38 from Josso/patch-1

Added pluralization to NextLevelConfirm
rebuild for pull #38 @josso
Undo button functionality Issue #40