CLIMATE-452 - Add Unity desktop option to VM Build

- Add Ubuntu Unity option to OCW VM Vagrant build. By default XFCE is
  installed. If a user wants Unity, they should comment out the XFCE
  section and uncomment the Unity section when building the machine. It
  should be noted that the Unity install takes longer, but it comes with
  a lot more stuff out of the box (including looking nicer in general).
CLIMATE-453 - Add Taylor Diagram creation example
CLIMATE-454 - Copy over install dependencies during VM build

- The requirements files for pip and conda weren't being copied over
  during the VM build which was causing it to fail. The requirements
  files for both pip and conda are copied over now even though the conda
  one isn't used at the moment. In the future, it is planned that conda
  will be used instead of downloading an Anaconda Python distribution.
CLIMATE-455 - Update reshape_monthly_to_annually to use copies of data

- utils.reshape_monthly_to_annually now uses a copy of the passed
  datasets data instead of the actual datasets.values.
CLIMATE-456 - Move DAP test initialization to setup_class

- Move OpenDAP test initialization to setup_class method. This also
  seems to fix the issue with nose-exclude not ignoring the test_dap
  file when instructed to
- Rename the test class to fall inline with project naming standards.
CLIMATE-457 - Cleanup after Easy-OCW install on Ubuntu

- Cleanup Basemap and Anaconda files after installation is complete.
CLIMATE-458 - Add symlink for UI frontend to VM build
Resolve CLIMATE-452. Merge PR #54.
Resolve CLIMATE-453. Merge PR #55.
Resolve CLIMATE-454. Merge PR #56.
Resolve CLIMATE-455. Merge PR #58.
Resolve CLIMATE-456. Merge PR #59.
Resolve CLIMATE-457. Merge PR #60.
Resolve CLIMATE-458. Merge PR #61.