Fix curl error handling when querying GitHub
Update CHANGELOG.markdown

Fixing version number of last release
Update UPGRADE.markdown

Fixing broken Markdown link
Adding SIP validation helper function
No longer including client/account data

Prune client/account data from json encoded list of phone number
countries to alleviate uneccesary 'recursion detected' JSON encode
error in the logs.
Fixing notice about phone number status
Fixing various notices and warnings
Cleaning up code around password resetting
Resetting log-level to error only
Adding contribution guidelines to the ReadMe
Return template render
Update twilio-php Service
Update changelog
Merge branch 'michaelcurry-master' into develop
Send calls to voicemail if line is busy
Update readme
Clarify iPhone email install instructions
Remove obsolete and unused override to setTimeout

Override in global.js was causing oddities across various pages, mostly the
flow editor, where it somehow managed to cause recursing errors around
argument lengths. Its not needed and it was a bad idea in the first place.
Update readme formatting
Use `json_last_error_msg` in Github check when on PHP 5.5