Added README.md file for github project information.

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>
Added get-headers.sh script for downloading and populating android headers

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>
Initial import of latest Android project headers.

Signed-off-by: Tom Swindell <t.swindell@rubyx.co.uk>