Tweaks to the CMake description to work better on Android.
I figured out how to make static libraries useful instead of conflicting on Android so I re-enabled the option.
Adding an Android "prebuilt" Makefile as an example/template/reuse so Android users can leverage the CMake built binaries instead of reinventing the entire build system. Use Android-CMake for best results. (My branch found on Bitbucket is currently best, though that may change over time.)