clean up.
better error type.
MyriaCatalog: get *real* numTuples.
delete unused code and html.
typo.
github.css: transparent background for queries view

also an automatic IDE whitespace fix
queries: myrial programs wrap instead of full width

Still don't have scrolling, but couldn't figure it out with 10 minutes of Googling.
correct comments.
refactor creating fragmentIndex.
create subQueryIndex, which is defined by pre-order traversal.
collectGraphNodes: support sequence and dowhile.
Refactor: normalize opId, id in argChildren and argOperatorId
merge conflicts

Conflicts:
	appengine/js/graph.js