Allow standalone building via GNU make, and implement Android specific fast build.

Fast build is implemented via ninja and node.js (or Carakan jsshell) which uses some
massive POSIX specific hackery and soul trading with the devil. As a result clean build
times for androidVoxDev.js are around 4.5 times faster in realtime, follow up build with
changes in any file is 6.5 times faster, and cleaning is about 4826 times faster. God
bless spaghetti dependency chasing.

As a drawback you can only build on Linux or OS X, and only for Android. :-)