Change indentation of master label object

The table is now indented in a more standard and readable way.
Add taxa labels color selector

Add color picker to change the color of taxonomic assignments when
plotting biplots.

Fixes #162
Add jQuery setup for taxa color selector

Fiexe #162
Add changelog for this pull request
Merge branch 'master' of git://github.com/qiime/emperor into issue_162

Conflicts:
	ChangeLog.md
	emperor/format.py
Merge pull request #163 from ElDeveloper/issue_162

Add color selector to biplot labels