Dojo update

1. Delete `ThirdParty/dojo-release-1.7.2-src`
2. Add `ThirdParty/dojo-release-1.8.3-src`
3. Updated source with find and replace.
4. Updated CHANGES

Now that we updated dojo, there are some other tweaks I want to make, but I didn't want this pull request to be anything other than a straight upgrade.