Added RSpec Tests for Fan Control

Added RSpec tests for fan control. Set test environment variable in spec_helper.
Deleted app_spec and moved it to fan_spec for clarity when I write the pump tests.
Made a lot of assumptions so far, as the CommanderSK library hasn't been written yet.

Will write that after I finalize pump_spec.rb and then write application.rb to reflect
correct test methods.

Signed-off-by: "Jake Champlin" <jake.champlin.27@gmail.com>
Merge branch 'test-first'