Moved SleekTest to sleekxmpp.test.
Organized test suites by their focus.
- Suites focused on testing stanza objects are named test_stanza_X.py
- Suites focused on testing stream behavior are name test_stream_X.py
Forms have default type of 'form'
setFields now uses a list of tuples instead of a dictionary because ordering is important.
getFields defaults to returning a list of tuples, but the use_dict parameter can change that
