fix myriad multiway join.
Merge pull request #169 from uwescience/fix_multiway_join_myrial

fix compile MyriaL to multiway join
editor.js: show datasets created on successful query
myria-web.js: fix profiling JS after uwescience/myria#573

@jingjingwang changed the JSON format, but only Myria code was fixed.
Need to fix myria-web, myria-python, etc.
update myria-python submodule
Merge branch 'master' into dhalperi-show-datasets-created
datasets: remove download link for big datasets

Can only download datasets where we know the size and fewer than 100M cells.
(Number of cells is # cols * # rows.)
update test_myria_up to test both large and small datasets

- add TwitterK
- add numTuples for both Twitter and TwitterK
- check that Twitter's download link does not show in the page (too big)
- check that TwitterK's download link does show in the page (small)
Merge pull request #173 from uwescience/dhalperi-show-datasets-created

Dhalperi show datasets created
Merge branch 'master' into yorkw-ccatalog

Conflicts:
	appengine/js/editor.js
	appengine/myria_web_main.py
	appengine/templates/datasets.html
add clang catalog
needs schema for dataset created and execute
needs numtuples and schema