Remove mention of checksum

The checksum attribute of ark is just passed on to remote_file.  remote_file uses this to detect changes and prevent unnecessary downloads.  Unfortunately, it does not use it for security.

Obvious change.
Updated the Gemfile to use later spec versions
Updated Spec Helper

* Added color to the output
* Added an alias example so I can use `describe_recipe "ark::default"`
* The alias automatically loads the shared_context that gives me some
  helper methods like:

  ** chef_run - default run with no node_properties
  ** node - the chef_run's node.
  ** node_properties - blank, but can be overriden when needing to change the platform
  ** default_cookbook_attribute - lets me check for an attribute on the node
Adding specs to the default recipe

* tests the default recipe for all packages and default parameters
* tests the default recipe for CentOS
Linter Fixes for spaces and such
Testing for the tar path in default properties
Specs for Windows and FreeBSD and their differences
Windows and not Windows will chedk for the included recipe
Moved the recipe specs out of the unit directory

From my ruby days I like to see the folder path of the project be mirrored in the spec directory. I don't think I need to specify that they are "unit" tests by placing them in a special folder.
Adding a `describe_helpers` spec to setup common testing tasks

Similar to the `describe_recipe` I want to setup a helper that allows me to automatically take care of spec setup. Particularlly testing helpers is a bit trickier, at least for this gem, as it often times is relying on the "new_resource" which is available within the LWRP.
WIP: Testing Libraries
100% coverage of libraries helpers
Removing commented out code
Initial refactoring of the Libraries Helpers
Initial specs for testing the LWRP provided by Ark
Complete coverage of the LWRP actions
Replacing the integration specs from the cookbook

Moved them into the fixture cookbook.
FIX: Two specs were using a helper that was no longer in use
Rubocop Offenses

The simple attr issue in the spec_helper is a dumb one so I'm going
to block it on the spec_helper as my uses are different and I don't want
to have the presence of an equals sign.

The other things were small line issues spread throughout.

Refactored to use each_with_object to quiet down rubocop as well.
Travis-CI updated the links to appropriate account