building using gradle, first steps
move core src into main/java (gradle default)
build the apk with gradle instead of ant within processing.  At the moment, requires JAVA_HOME to be set to a jdk installation
remove a couple of debug log lines
ask the user where their jdk is if JAVA_HOME is not set or isn't the jdk
Merge branch 'master' into gradle
make localDeploy build core, and add an deploy.local alias
Merge graphics library into mode repo
include graphics25d as a gradle submodule
change repo readme