Document build process, add license

Remove gradle.properties

Local signingconfig paths should not be in git

Better fix for Fix NanoHTTP 2.3.1 bug "BAD REQUEST"...

The previous one did not work for "POST /api/v1/events" that
the OUYA regularly makes.

Solution by @marianolc in
https://github.com/NanoHttpd/nanohttpd/issues/356#issuecomment-380158910

Special URL for storing the gamer key

Handle requests with // at the beginning

.. so that the agreement works

Remove howto.log.txt

Fix NanoHTTP 2.3.1 bug: "BAD REQUEST: Syntax error. HTTP verb .. unhandled"

Happens when data are POSTed or PUT without us reading them.

Bug report: https://github.com/NanoHttpd/nanohttpd/issues/356

Solution by @cowenberg in
https://github.com/NanoHttpd/nanohttpd/issues/356#issuecomment-288422714

Error message we got:
E/f       (  571): Got failure response with message: BAD REQUEST: Syntax error. HTTP verb gamer%5Bkey%5D=-----BEGIN+PUBLIC+KEY-----%0AMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDUYcfiISnlc%2FHrpRi%2BTX1keBUoY2%2FiR45q0sy6%0A3SXkzgmgQCf5Kitx6rv0djQEOP%2FcvIFYFOx8At%2FAwgzhd8ltU%2F1Z%2BRNohukXvMMiCuJr5CNhtdxp%0ABfWF%2FSTV%2FDSYPpP%2BZtLgthNhERomW8krVcgxV%2F%2B9NK2NHA0W7IJ%2FmIzffwIDAQAB%0A-----END+PUBLIC+KEY-----%0A&gamer%5Bpassword%5D=.&auth_token=00702342-0000-1111-2222-c3e1500cafe1&gamer%5Busername%5D=cweiskePUT unhandled.

Ignore .idea/ files

Load "signingconfigfile" if it has been defined in gradle.properties

Remove duplicated permissions in manifest

New icon

Show game data version

Show status information

Most of the API is implemented

First version that starts a permanently running HTTP server

Add intellij idea config

Add gradle binary :(