compile to multiway join
Merge branch 'master' into compile_to_multiway_join_option

Conflicts:
	appengine/js/editor.js
	appengine/myria_web_main.py
	submodules/raco
fix
Connect to localhost:8753
Use demo3 examples
change name of seaflow relations
fix comments
Merge branch 'master' into compile_to_multiway_join_option

Conflicts:
	submodules/raco
Merge branch 'master' into compile_to_multiway_join_option

Conflicts:
	submodules/raco
Merge remote-tracking branch 'origin/master' into andrew_sigmod_demo
raco: update for fix uwescience/raco#240
raco: upgrade compiler with do-while support
test_myria_down: fix for new raco that does not require catalog for datalog
raco: update submodule with temp subqueries fix
raco submodule: update for new backend encodings
submodule raco: update with datalog fixes
Merge remote-tracking branch 'origin/master' into andrew_sigmod_demo
Move demo3 examples to a file
Add simple sql, myrial queries
Add fancy sigma-clipping