utils.xor_bytes and utils.bytes_equal

utils module is now Cythonized for the benefit
of these new functions.
Move HACKING and much of README into docs
Fix several tests for Python 3
Add Travis badges to README
Merge branch 'ecc-ansi' into develop
Add dvanduzer to AUTHORS.txt
Bump to version 0.9.0
Merge branch 'utils'
Remove Travis badge for "develop"; not used
Merge branch 'meta'
Proof of concept that we can use bytes or buffers
Pull new buffer support into the core module
Create ByteSource to source bytes from

Now we can wrap buffers ourselves and release them
properly.
All of tomcrypt.cipher uses ByteSource
All of tomcrypt.hash uses ByteSource
All of tomcrypt.mac uses ByteSource
ByteSource tries bytes before buffers
All of tom crypt.{pkcs1,pkcs5,utils} use ByteSource
All of tomcrypt.prng uses ByteSource
Most of tomcrypt.rsa crypt methods use ByteSource

Skipped key import.