Commit todo list.
Update TODO.md
Move Riak.php up to change class init from Basho\Riak\Riak to Basho\Riak. Create Basho\Exception class. Update Basho\Riak\Exception to extend Basho\Exception. Update docblock tags across all source files.
Merge branch '1.4' of github.com:cmm324/riak-php-client into 1.4