progress now only emits on 101-199 (not 100)
progress switched back, for all provisional responses now
Looser toplabel parsing
Added missing
iceFailed event
Header parsing shouldn't throw exceptions.  Thanks to Balazs Sandor for PR #102
Refactored PR #101.  Thanks to Emilio, Ptah, and the LiveNinja team.
Added additional ICE events

Added additional ICE events of disconnected and closed
Fixed spacing to match repo
Allow '0' as a DTMF tone.
Gruntfile.js: tell uglify to give ascii output

see https://github.com/onsip/SIP.js/issues/106#issuecomment-57349358

resolves #106
UA#onTransportError: don't try next transport if UA is closed

addresses #63
Gruntfile.js: uglify once, copy twice

This trims roughly 1 second from `grunt build`
Gruntfile.js: remove templates from banner string

Simplify browserify's postBundleCB
src/SIP.js: fix indentation
Remove explicit false check for DTMF tones.
Merge pull request #105 from Bat-o-matic/master

Allow '0' as a DTMF tone.
Logger, LoggerFactory: dedupe error/warn/log/debug definitions
Move Logger definition into LoggerFactory.js
LoggerFactory: iterate over `levels` to define error/warn/log/debug