By passing --omit_begin_end=1 to generate_test_runner.rb, the script
will now omit calls to UnityBegin and UnityEnd when running tests in a
suite.

This allows multiple suites to be executed in a row, and then have an overall
summary of the tests which were executed across all suites.

Fix docs.

Converting RUN_TEST() from a macro to a function significantly reduces the size
of the compiled binary.  On amd64, the largest test runner in the test suite
(testsample_DefaultsThroughCommandLine_runner.o) was reduced from 3.4 kB to 2.4
kB (stripped).

- Tweak a couple style problems with Ruby scripts.

The include must be in the first line, else you may expect some issues.
Some autoformat tools could sort the includes alphabetically and could
break the test.

- Running time macros have been made more portable, previously it was not
  possible to override all macros
- Running time macros will be executed by default test runner, and auto test
  runners
- Adds a default execution time implementation for unix. (Previous default
  implementation only worked on Windows)
- For embedded platforms there is a simple method of getting a default
  implementation by defining a single macro UNITY_CLOCK_MS()
- Removed need for UNITY_EXEC_TIME_RESET. This was not being used for the default
  implementations, if anything ever did need reset-like functionality it could
  simply be wrapped up with the start or stop macros for that platform

This allows multiple groups to be compiled into the same executable by naming each function uniquely.

Adds support for :mock_suffix when generating mock setup and teardown
functions. Also documents both prefix and suffix in the helper script
guide.

Fixed unity fixture output and added methods for each of the different outputs. Added documentation.
Fixed some whitespaces.
Refactored class_name to class_name_idx (expressiveness).
Refactored the xml output to methods (extensibility).

- Added more expressiveness to the code
- Fixed some of the rubocop hints

Refactored the os specific settings, it is now possible to convert both styles on every system (and even mixed)

- Fixed stdout output if fixture is active
- Refactored the state manipulation of @test_suite and moved it completely into test_suite_verify()

- String split now works correctly for windows and unix (cross platform)
- Removed unnecessary whitespaces in the xml output (beautifies the output)
- Added support for TEST_IGNORE() (without message)

Auto generated test runner should generate a code  which includes
setjmp.h only if UNITY_EXCLUDE_SETJMP_H is not defined