Updated method of testing generate_test_runner script to be a FUNCTIONAL test instead of a perfect code match. Backfilled most tests and added some coverage not previously present. Still need to test new command line args and a few cmock details.

 Make core Unity rakefile helper follow Fixture define procedure.
 This commit reverts parts of 36e2ca19.

 Now that the project is using .gitattributes, get rid of CRLF in the repo.

 Updated clang and gcc targets. Fixed spelling of LIMITS, which breaks the
  gcc_auto_sizeof.yml build.
 Commented -Wunreachable-code, Unity won't build on OSX clang with it,
  error in unity.c:769 & 932: 'default: break;' case.

We're going to use the C99 isinf() and isnan() macros wherever possible now. If your compiler doesn't support this, define UNITY_EXCLUDE_MATH_H and it will go back to the old method

rearranged project to centralize all self-test stuff under test directory. only pull in includes when required.