Merge pull request #11 from echomike/master

Documentation fix. Appkey was listed as "test.aboutechoe.com"
[docs] How to develop an app guis typos fixed
Merge branch 'master' of github.com:EchoAppsTeam/js-sdk
Unnecessary function parameter removed
Changes to the the "How To Develop and App" guide to make it more accurate
Merge branch 'master' of git://github.com/EchoAppsTeam/js-sdk