Fixed Issue #15, updated ED link, see https://github.com/sysapps/telephony/issues/15
Fixed Issue #3, scope and use cases, plus references. See https://github.com/sysapps/telephony/issues/3
Fixed issue #4,added dialEmergency() method, see https://github.com/sysapps/telephony/issues/4
Fixed issue#7, added startTone() and stopTone() for long press DTMF support, see https://github.com/sysapps/telephony/issues/7
Fixing errors discussed in pull request #16, see https://github.com/sysapps/telephony/pull/16
Merge pull request #16 from zolkis/gh-pages

handling issues #3,4,7,15.
Merge pull request #19 from efullea/gh-pages

Acknowledgements
Issue #4 emergency calls, added acks, editorial changes
fixing typos
Merge pull request #20 from zolkis/gh-pages

Issue #4, emergency dial, added acks
fixing issue #21, conference calls + editorial changes
Removed extending call handler
Moved the call hanlder interface to its own section (closes #38)
Added TelephonyCall implements CallHandler, fixed headings
removed redundant text about CallHandler objects
Linked to implement definition in WebIDL
Fixed headings, moved implements IDL statements
removed mention of CallHandler
Moved text about supported specs (closes #25)
Made DTMF a citation (closes #37)