Add License file.
Add License file.

The license is MIT. It is the same as the
existing PhoneGap platform implementations.

corimf/cordova-blackberry,corimf/cordova-blackberry,blackberry/cordova-blackberry,deedubbu/incubator-cordova-blackberry-webworks,corimf/cordova-blackberry,blackberry/cordova-blackberry,apache/cordova-blackberry,deedubbu/incubator-cordova-blackberry-webworks,apache/cordova-blackberry,apache/cordova-blackberry,blackberry/cordova-blackberry