Issue #6.  Adding load from url feature.
Renaming cask_title to requested_cask for clarity.
Merge branch 'master' into cask-strategy

* master: (75 commits)
  Update Shuttle from version 1.1.1 to 1.1.2
  no version but latest
  OSX port of the awesome gqrx SDR software
  SdrDx – OS X and Windows SDR Software
  Updates version for LibreOffice to 4.1
  Adds cask for Simon.app
  DSP Radio - Software Defined Radio for Mac OS X
  CuteSdr, the QT based SDR project from RF-Space.
  Updated to Zotero 4.0.9
  add maratis 3.21
  updated xld to 20130720
  Rename HexFiend.rb to hexfiend.rb
  Add latest Hex Fiend.
  Add AeroFS cask
  Update link option.
  Add cask for MongoHub (https://github.com/fotonauts/MongoHub-Mac)
  Add cask for Robomongo (http://robomongo.org)
  Add cask for MongoHub (https://github.com/fotonauts/MongoHub-Mac)
  Adding 'Google Earth'.
  Add link to OpenOffice
  ...
Fixing test file url
Simplifying uri source validation.
Fixed uri in test case
Merge pull request #833 from ShaneDelmore/cask-strategy

Issue #6 Load cask from url enhancement.