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.

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