exercise embed.py module
Merge branch 'master' into feature/tests
add tests for resources.py
Add js test for ColumnDataSource

Also took this opportunity to remove unused methods, regularize
method names on ColumnDataSource, and handle some edge cases properly
Merge branch 'master' into feature/tests
temp fix for missing bs4 dep
try again for bs4
different bs4 name is on default channels
Merge branch 'master' into feature/tests

Conflicts:
	scripts/travis_install
merge master
Merge branch 'master' into feature/tests
Merge pull request #905 from ContinuumIO/feature/tests

add some tests