guides/user-agent-construction.md: update jsfiddle to prerelease-0.6.0
guides/make-call.md: update jsfiddles to prerelease-0.6.0

Remove the "Displaying the Call" section, since it can now be done with
invite() arguments.
guides/receive-call.md: update jsfiddles to prerelease-0.6.0

Remove the "Register A SIP User Agent" fiddle, since it's essentially the same as the next one.
guides/reuse-mediastreams.md: update jsfiddle/code to prerelease-0.6.0
Fix a couple of typos in 0.6.0 API docs

- existance
- Optioanlly
Merge pull request #5 from wpp/typos

Fix a couple of typos in 0.6.0 API docs
Whitespace and window.* cleanup
Some devcon code cleanup for better snippetization
update send-dtmf guide for 0.6.0 release
Code snippets for devcon
Finish up some 0.6.0 TODOs
Made API sidebar work for 0.6.0 release
Transport TODOs
0.6.0 files for download
Update download page for 0.6.0 release
Finished 0.6.0 release
Change SIP Message on 0.6.0 sidebar
Merge pull request #6 from onsip/060

060
Add NPM instructions to the downloads page
add MediaHandler to 0.6.0 sidebar