Upgrade Starling Maven Flexmojos Build to work with Apache Flex

Hi,

I've upgraded starling framework maven build to work with flexmojos 6.0.1 that supports Adobe Flex and Apache Flex SDKs.

I upgraded as well to playerglobal 11.7 since there's code dependencies in this Flash Player 11.7

As a side upgrade, i'm working with IntelliJ IDEA and added .idea config files to .gitignore to avoid any control version for this kind of files.

Final comment and implications of this patch: I succeed building Starling Framework with Flexmojos 6.0.1 and Apache Flex SDK 4.9.1.1447119 inside IntelliJ IDEA 13 latest EAP (this will not work in current 12.1.4 release since it needs a fix to get flexmojos working with "org.apache" namespace instead "com.adobe")