v2.0.0

Version 2.0.0

* Breaking: ABI incompatibility with prior versions of criterion. You
  **must** recompile your tests.
* Breaking: cr_abort_test(NULL) does not compile anymore.
* Change: Changed all assertion macros to accept a printf format string as a
  message.
* Change: Made the API C++11-compatible.
* Change: Made the library ISO C compliant. You can now compile the library
  with VC 14+.
* Addition: Added support for theories.
* Addition: Added ability to test the exit status of a test.
* Addition: Added C++11 throw assertions.
* Addition: Added assert message localization.
* Addition: Added test timeouts.
* Addition: Added test standard i/o redirection & file comparison assertions.
* Removal: Removed the deprecated prefixless assertion macros
* Deprecation: Deprecated cr_abort_test.
* Deprecation: cr_{assert,expect}_strings_* and cr_{assert,expect}_arrays_*
  are deprecated in favor of cr_{assert,expect}_str_* and
  cr_{assert,expect}_arr_* respectively.