Added CocoaPods and all of its dependencies

CocoaPods is an iOS dependency management tool. The primary motivation
for using CocoaPods at the time of this commit is in order to install
  the unit testing framework, Kiwi.

CocoaPods is deployed as a ruby gem and therefore, requires Gemfile
data.  CocoaPods's dependencies have been packaged in the vendor/cache
directory and can be installed by running the following command in the
root project directory:

bundle install

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>
Added the Kiwi Testing Framework.

The project must be opened using the Notation.xcworkspace file. Kiwi
uses workspaces to maintain the main application targets and the testing
targets. Tests can be run using XCode. Tests can be placed in the
NotationTests/ directory.

The main application targets have been properly configured to interact
with the testing targets and vice versa.

Signed-off-by: Byron Sanchez <bfs5030@gmail.com>