Doc points to core for Maven but Android for Gradle

[Rabea Gransberger]

The Website http://jdeferred.org/ point to the core version for Maven but to Android Version for Gradle. That is confusing.

org.jdeferred jdeferred-core ${version}

compile 'org.jdeferred:jdeferred-android-aar:${version}'
// or
compile 'org.jdeferred:jdeferred-android-aar:${version}@aar'