Add Firefox to tested browsers
Add correct exception text for Firefox test
Fix build tests for Firefox
Rename tests make target to test, add test-dev
Ensure generated text node content is always a string
Add Opera to tested browsers
Add correct exception messages for Opera
Remove !bare support for ist! amd plugin
Remove ActiveX XMLHttpRequest from amd plugin
Make tests depend on building up-to-date ist.js
Release v0.6.3