better error info
rename to handle .schema
adding small comments
grappa read/writes in shared
starting display grappa results
grappa json results
Merge branch 'yorkw-matrix-multiply' into yorkw-abstract-backend

Conflicts:
	appengine/myria_web_main.py
	clangtestserv/nodeserver/metastore.py
add multiway join as another backend
abstract myria backends
factor profiling
refactor getplan
removing unneeded clang