- extraneous '[' does not cause infinite loop
- dates follow excel form (`yyyyyy` treated as `yyyy`)
- more general exponential form (more tests)
- unreachable default cases removed
- 100% test coverage
- added test_min and cov_min targets
more formats:
o fractional seconds
o absolute time formats
o generalized engineering notation
o better resolution in splitting format strings
o support for LO uppercase date+time formats
other changes
- no more prototype pollution
- many many more tests
- passes jshint
- code coverage: blanket + coveralls + travis
- npmignore test files
