Add XCTestCase subclass with helper methods.
Merge branch 'master' into enhance-add_tests
Yo dawg.

We are "testing" our tests. Not sure if there is a right way to do this.
Correct checking for color-not-equals.

Move tests for test helpers to separate class.
General cleanup of tests

- Fix code style
- Move delegate tests to one place
- Add lots of TODOs for tests I want in place
Prep for testing. Need to be able to get the padding.
Move paddingDistance to public API.

We need to be able to get the padding distance for tests, and it *may* be helpful to others. I can't think of any reason this shouldn't be public API.
Work on RSColorPickerView-setSelection tests. Looks like there might be a bug, as one of them fails currently.
/cc @unixpickle
Separate RSColorPickerView-setSelection tests further.

Now testing based on how we create the new selection; by point or by color. This should help track down bugs.
Add more verbose description to RSColorPickerState
Add parenthesis to make logic easier to follow
Fix failing RSColorPickerView-setSelection tests.

The issue is that we were neglecting to set the brightness/alpha along with the point, which is kind of important.
Rename RSColorPickerTests to RSColorPickerViewTests

This is in preparation of moving delegate tests to separate file.
Add CPTestCase import to precompiled header. Move delegate to separate file.

I added the CPTestCase.h import to the PCH because Xcode doesn't add the import automatically when you create a new testcase subclass with a custom superclass specified. Therefore it doesn't automatically index and add to the test list. This should fix that.
Cleanup variable name for delegate declaration
Update comments in public header.

The old comments were formatted incorrectly, or lacking altogether in some cases.
Add RSColorPickerView-colorAtPoint tests
Add basic showLoupe tests.

I don't know how to really test this type of stuff.
Add color function tests
Fix accuracy?

This test passed on my local computer, but not travis. I am switching the test to use accuracy.