Adding repositories so dependent dependencies can be resolved

[ERROR] Failed to execute goal on project compatibility-v7-mediarouter: Could not resolve dependencies for project com.simpligility.android.sdk-deployer:compatibility-v7-mediarouter:apklib:2.4.0: The following artifacts could not be resolved: android.support:compatibility-v7-appcompat:apklib:19.0.0, android.support:compatibility-v7-appcompat:jar:19.0.0: Could not find artifact android.support:compatibility-v7-appcompat:apklib:19.0.0 in central (http://repo.maven.apache.org/maven2) -> [Help 1]