Defensive coding

Originated from commit c6dc96f3 but are rarely used and not in math.h
Removes float to double promotion warning and simplifies the code
'gcc -std=gnu99 -Wdouble-promotion' spits out these warnings

Remove UNITY_FIXTURES option, which was probably not doing what was
originally indended. It was suppressing the test name even in quiet mode.

Revised internal type naming scheme to better sandbox Unity away from everything else. Sure, short was nice, but not at the expense of naming collisions.

Takes about 10 minutes to run all floats, so split into 3 tests for parallel
running later. This was useful during development for finding hard corner cases
and getting the routine to high quality. Off by default.
Note that all floats 16.0 and up can be represented uniquely (in this format) and will
round-trip back to the exact same float with sscanf(). This property is true for
UnityPrintFloat, despite a few rounding error cases, it will produce output identity.

Better comments and refactor on round ties to even
Add upper threshold value on round to even feature since numerical precision issues
start to give approximations when dividing one large double by another. When tested
on float values, using 1e22 gave the fewest rounding errors.

Fix warnings from gcc. Some float constants do not behave well in existing tests.
Add casts where conversions could be imprecise.

Move double tests down in the file

Remove UNITY_FLOAT_VERBOSE entirely, add option UNITY_EXCLUDE_FLOAT_PRINT
Remove some questionable float casts from doubles
Default to Round Ties to Even behavior, add option to Round Ties Away from Zero

Linux gcc & clang and OSX clang produce output with ties round to even
Windows mingw gcc does not
Example 0.0078125 prints '0.007812'

Change some types to signed for simpler code and speed
Added format to distinguish small numbers

Print 9 digits

Delete old method for printing

Improve printing six decimal places, remove trailing 0's, fix the carry when
numbers like 0.9999999 round up and print leading zeros in the decimal

The first attempt at printing floats had precision issues where the last few
digits would often be wrong. This next approach may yield a better algorithm
for numbers less than 4.29 billion, those that fit in 32 bits.

We can’t guarantee that the built-in function insane will return 1. It might return any other non-negative value. Therefore we need to force it to be 1 so we can use the comparison operator later.

 Generalize loop to print decimal format and exponential
 Add '+' to exponent when printing larger floats

fix cppcheck "Array index 'i' is used before limits check."

Finished fixing floating point comparisons. We have streamlined how floats and doubles are checked, but we still can't compare them for equality directly. So we're directly testing for infinite and NaN before checking diffs. Also, we've officially decided that for testing purposes NaN shall equal NaN, +Inf shall equal +Inf, and -Inf shall equal -Inf. It's what most people expect during a test.

 Changes from "\0x16" before, makes it easier to copy strings from output

 Change the parameter of UnityPrintFloat from float to double (_UD)
 The call to snprintf uses implict default promotion to a double anyway

 Delete old comments from before math.h was the default isinf() method

 Refactor to use the same code everywhere for FloatWithin check
 Rename and fix a few tests for new behavior, infinity == infinity

 Covers the cases where infinity == infinity

- Added ability to surround filter strings in either type of quotes
- Added ability to filter on multiple test strings as a comma delimited list
- Added ability to filter on test_file:test_name
- Added ability to use alternate syntax for filter of -f="blah"

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.