maintenance: do not run tests in default grunt task
fix: show print button in iframe views
upgraded enketo-core to 3.1.0, updated build dependencies and readme.md
fix: switch CI Travis to node 0.10.x
feature: GMaps layers in Geo widgets + fixes. See enketo-core 3.2.1.
Merge branch 'master' of https://github.com/enketo/enketo into production-auth