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
Update Skype to 6.7.59.373
Insync 1.0.20.31600
Adobe Air 3.8
Anki 2.0.12
Brackets Sprint-28
Istopmotion 3.1.1-15400
Blender 2.68a
Multibit 0.5.13
Makemkv 1.8.4
Fantastical 1.3.9
Cutesdr 1.11
FileBot 3.61
Vienna RSS 3.0.0_beta13
HandsOff 2.0.8