Add links to Appium.app and Appium.exe in intro document.
[ci skip]
Added missing newlines to end of docs files.
[ci skip]
Updated required node.js version to 0.10 (based upon information in README).
[ci skip]
Updated references from iOS 6.1 to iOS 7.1 and references from Android 4.2 to Android 4.4.
[ci skip]
Merge pull request #2726 from edgy360/master

Update version numbers and newlines in docs
Merge remote-tracking branch 'appiumio/master'