attempt to migrate to newest Gradle-based build system.

thanks, incompatible changes!
Updated gradle to 1.10, include gradle wrapper jar
Update minsdkversion to 9, in light of CookieManager
removed by Android Studio. for some reason.
some gcmhelper tweaks, and improved logging
sdk and version info are handled by build.gradle, remove them from the manifest.
fix default value alert_sound, which prevented noises from working correctly
add required "feature graphic" for the android market
add background to png. sigh.
fix some lint warnings about Integer.valueOf
remove unneeded cruft from build.gradle.
new name for the android gradle plugin.
Actually show the toast we worked so hard to make!
lint warnings about Locale
comply with button order guidelines for api versions >14
turn editor subject into a hint, instead of text