README: /bounds, /around use GET parameters
README: /bounds, /around use GET parameters

The documentation was wrong about /bounds and /around requiring a POST
payload.  Fix this.

Spotted-by: Ashok Gautam <31a31f733198e8bbfd8ef41e88fa23c849c4dc81@gmail.com>
Signed-off-by: Ramkumar Ramachandra <5c355d1d38066ed0c5de420d67c1b5ed0687c4bd@gmail.com>

artagnon/irale