myria-web: set high logging level

Apparently the default is INFO, let's make it WARN. INFO is used heavily
throughout raco.

Also, the datalogcompiler had a stray print statement that led to a lot
of spurious, and costly, output.

Fix #79.
Merge pull request #88 from uwescience/fix-79

fix #79
Merge branch 'production'

Conflicts:
	datalogcompiler
	submodules/myria-python
	submodules/requests