Merge pull request #90 from cgruber/release

Release 0.17
Remove getInterfaces() and getCanonicalName() references from gwt, and add invocations to the GWT test so this doens't recur.
Update a javadoc.
Merge pull request #91 from cgruber/fixgwt

Fix GWT support which was broken in 0.17. getInterfaces() is not supported in GWT.
Prepare to release 0.18