More statement coverage on NULL input feature

 Get test coverage on this feature for int, float, & double

 Add config flag for 64-bit, max covered lines even with 32-bit compilers
 Always print uncovered lines, delete separate make target

 Remove what looks like an overflow check. 'divisor' cannot overflow
  since it is the same type as 'number' and cannot be greater.

Add option to print FAILED instead of FAIL during the summary

 For easier automation and searching for a test suite failure

Thanks @rikvdh for catching some instances where we should have been using isnan and such that were missing!

Add Unity Fixture to the travisCI build and restore header declaration of UNITY_OUTPUT_CHAR

Fixup issues when compiling with clang -Wmissing-variable-declarations

 This solves the warnings from -Wredundant-decls when overriding the
  OUTPUT function with a function declared in another header.
 It's better this is the non-default option, since using it requires either
  a declaration of the new function OR a preprocessor guard on declaring
  UNITY_OUTPUT_CHAR (as in unity.c here), in every file using the function.
 See Pull Request #185 for more.

 These were aimed at preventing the internals header from declaring
  a prototype for 'int UNITY_OUTPUT_CHAR(int);'. The second part fixed
  an omitted declaration in the tests caused by the first commit.
 Will replace the default behavior & add an option for this in next commit

 Prevent changes in core Unity from silently breaking Fixture

Fix #182, remove redundant function declarations (Thanks xor-gate!)

Fix unreachable code in Unity on fully covered switch statements

 Revert the previous commit. Add tests for extended enum cases.
 Fix crash due to accessing 'trait_names' array out of bounds.
 Adding an extra invalid value to the end of an enum causes '-Wswitch' flag
  to warn unless there is a switch default case - also enabled by '-Wall'.

 The clang compiler warns here with -Wunreachable-code
 The enum's switch statement covers all cases, so default is unused
 Leave the break in the code as a comment, to be more clear
 The history is this default case was added in f6bb7162 - compiler warning.
 Then the break was added in c6dc96f3.

Add Makefile with coverage target for Unity

 Unity is at 92% coverage now
 Run 'make -s' to see coverage information for unity.c
 Run 'make uncovered' to get missing lines output

100% code coverage for Unity Fixture

 Add tests for uncovered lines

Fix C89 warnings about variables at top of scope, enums, variadic macros

Clean up IgnoreTest function in Fixture

 Add extern UnityFixture in internals header. Add C89 target in Makefile
 clang will show these warnings but can suppress "//" with -Wno-comment.

 By removing the call to the Conclude function the code is simplified
  and doesn't depend on global state updates. Tests that are ignored
  after the testBody is called still output the right EOL.

Delete function call syntax from Spy detect macros

 This fixes #168. See that github.com issue for more discussion.
 Allows the tests to build when putchar() is defined as a macro
  with parenthesis around it, as in the ARM embedded gcc compiler.