Finally, coverall works

Change-Id: I045c8b7ce3e14b94236b37efa7ea9e586b92de0f
Support coveralls, use istanbul for coverage reports.
Version bump

Change-Id: I98480806542493a625b970ea30d50f944a6e91bb
Merge branch 'release/v0.0.6' into develop
Specify master branch for badges.
Travis, run the coveralls target

Change-Id: Icb29e27b8c83c252b4c2f076328e88ff23ec15db