Minor updates to distribute.sh.

Includes:
 * Correcting visibility of debug text.
 * Adding build instructions for NDK v10
 * Removing purge of ctypes.
Initial purge of unnecessary Kivy code.
Corrections to build process to enable working libraries to be built.
Updates to get Rubicon downloads and build products in the right place.
Purge more unnecessary parts of the build scripts.
Added FFI to required support modules.