* tests: replace doctest with googletest
- googletest command-line output lists a nice summary of failed tests at the end, doctest's doesn't
- string test case names in doctest make IDE file structure view useless
- googletest has VS support
- doctest development stalled
other changes:
- get rid of doctest::skip(), all tests run now.
(was only applied to 3 tests: "winding", "mountain", "base1")
* check for test failure
* Revert "check for test failure"
This reverts commit a71d020c5a.
* fix test names to comply with gtest rules
Eric Wasylishen