Move to new expect syntax. Minor grammar change.
Allow for setting format from command line outside of RSpec.
Add knowledge of registered formatters for lookup.

The reason that this was put into the `RSpecIntegration` was for
simplicity. All registered formatters in this gem will inherit from
this. This also is a test run for potential changes that will need to be
made to RSpec core to prevent monkey patch it.

Another option was to store these classes in the `EmojiTestLove` module
during the call to `RSpecFormatter`. This was also a valid option. The
only reason this option was not chosen was to test drive a potential
change to RSpec core using the subclass hooks.
Move to using new hook for looking up formatters.
Allow for namespaced formatters.
Whitespace update ♲
Add 2.0.0 for Travis-CI testing.
Switch to new ruby-version format.
Move formatters into a neutral directory.

Update tests for the new location.
Remove old style formatters.
Fully embrace the new directory structure.
Make formatters stand alone modules.

Remove the RSpec integration from being loaded by a formatter directly.
The idea is to eventually add minitest support. They will share the
formatter modules and should not load RSpec.
Load the RSpec formatters.
Bump Ruby patch level.