Moved contributing text to contributing.md, other minor fixes
Removed text that doesn't apply anymore
Merge pull request #71 from marcoscaceres/work_package2

Tidied up code, fixed some small API issues.
fixed outbound call diagram
removed inConference from TelephonyCall
fix the changeDefaultService steps reference. Fixes #73
removed conformance requirements from dictionaries. Fixes #72
Fixing typos
Merge pull request #75 from martap/patch-1

Fixing typos
Merge branch 'gh-pages' of github.com:zolkis/telephony into zolkis-gh-pages

Conflicts:
	index.html
representing
fixed markup