Migrate from PSR-0 to PSR-4.
Move source files from "lib/" to "src/".
Rewrite pear packager script.

We still use Onion's package.ini for the configuration of the package
to keep things simple, but we might switch to a more compact solution
in the future since we do not really need much of its features.
Merge branch 'v1.0/psr-4'

This merge closes #168.

Conflicts:
	src/Command/KeyKeysV12x.php
	src/Profile/RedisVersion120.php
Add dedicated server profile for Redis 3.0.