Update version to 0.5.0 due to notable change:

Websocket connection is now secure; works with api.weblogng.com
Update 'watch' task to watch for changes in *.coffee files, not js
Use the v2 log endpoint over https.
Switch from WebSockets to https.
Create structured log v2-style messages instead of the flat v1-style.
Improve robustness of tests that involve generating live timestamps.
Bump version to 0.6.0-dev.
Update library contact info.
Merge branch 'issue-2-switch-to-v2-log-api'

Switch to v2/log api, send a single message at a time.