A commit to resolve issue #13 and wrap thor tasks in dradis binary

[siebertlubbe]

Have a look and see if you like. The dradis thor wrapper is not really complete, it landed in the pull request by accident but your input would be cool.

[etdsoft]

Hey Siebs,

This works cool on 1.8.7 but breaks in 1.9.2:

/home/etd/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': no such file to load -- lib/tasks/thorfile (LoadError)
from /home/etd/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from ./dradis:6:in `<main>'

Probably we need some trickery around $: this seems to do the trick:

require File.expand_path('../lib/tasks/thorfile', __FILE__)

Will merge and commit the change.