Added rake and rdoc as dev deps, also removed sql files from gemspec.
Changed readme to give a better description of the project
changed rdoc rake task to use *.rdoc in the project
cleaned up gemspec
removed rake console task.

There's no point in having a task like that, if someone wants to run clara from the console they can do `pry --gem` or `irb -I./lib -rclara`
Cleaned up rakefile

Changed the double quotes strings to single quotes since we don't use interpolation