Gridpath

What's Changed
* **Feature**: Supplemental firing by anamileva in https://github.com/blue-marble/gridpath/pull/913
* **Enhancement**: Add market interactions to dispatch plot by anamileva in https://github.com/blue-marble/gridpath/pull/914
* **Testing**: Add tests for plots by anamileva in https://github.com/blue-marble/gridpath/pull/915
* **Feature**: Transmission capacity groups by Janie115 in https://github.com/blue-marble/gridpath/pull/912
* **Feature**: Allow percent reserve reqs to vary by stage by anamileva in https://github.com/blue-marble/gridpath/pull/916
* **Enhancement**: Use net purchases in dispatch plot by anamileva in https://github.com/blue-marble/gridpath/pull/919
* **Maintenance**: Run test suite daily by anamileva in https://github.com/blue-marble/gridpath/pull/921
* **Enhancement**: Only update spinup_or_lookahead_flag if any are 1 by anamileva in https://github.com/blue-marble/gridpath/pull/922
* **Feature**: Availability for storage component of hybrid prj by anamileva in https://github.com/blue-marble/gridpath/pull/923
* **Maintenance**: Updates to Sphinx an ReadtheDocs setup by anamileva in https://github.com/blue-marble/gridpath/pull/924
* **Maintenance**: Test on multiple Python versions by anamileva in https://github.com/blue-marble/gridpath/pull/925
* **Enhancement**: Only write Tx flow limits tab file if needed by anamileva in https://github.com/blue-marble/gridpath/pull/926
* **Fix**: Fix for multiprocessing on Linux by anamileva in https://github.com/blue-marble/gridpath/pull/927
* **Fix**: Fix test example that fails on Windows by anamileva in https://github.com/blue-marble/gridpath/pull/928

**Full Changelog**: https://github.com/blue-marble/gridpath/compare/v0.13.0...v0.14.0

What's Changed
* **Feature**: Min and max proportion of fuel in fuel blend by anamileva in https://github.com/blue-marble/gridpath/pull/861
* **Feature**: Fuel burn limits by anamileva in https://github.com/blue-marble/gridpath/pull/864
* **Feature**: Relative fuel burn limits by anamileva in https://github.com/blue-marble/gridpath/pull/865
* **Enhancement**: Write subproblem directory if 1 subproblem w stages by anamileva in https://github.com/blue-marble/gridpath/pull/872
* **Feature**: Allow 'solver' option via solver settings by anamileva in https://github.com/blue-marble/gridpath/pull/874
* **Maintenance**: Pyomo upgrade by anamileva in https://github.com/blue-marble/gridpath/pull/875
* **Feature**: Carbon tax allowance for fuel blend by Janie115 in https://github.com/blue-marble/gridpath/pull/878
* **Feature**: Performance standards by Janie115 in https://github.com/blue-marble/gridpath/pull/877
* **Feature**: Support for cycle selection (e.g. simple cycle vs combined cycle mode) by anamileva in https://github.com/blue-marble/gridpath/pull/882
* **Feature**: Transmission flow by Janie115 in https://github.com/blue-marble/gridpath/pull/834
* **Feature**: Project contribution to magnitude of reserve requirements by anamileva in https://github.com/blue-marble/gridpath/pull/884
* **Feature**: Support multiple carbon cap zones per project by anamileva in https://github.com/blue-marble/gridpath/pull/885
* **Bugfix**: Fix bug when getting inputs from database in fuel burn limits by Janie115 in https://github.com/blue-marble/gridpath/pull/893
* **Bugfix**: Fix bug in carbon tax allowance query by Janie115 in https://github.com/blue-marble/gridpath/pull/894
* **Feature**: Support passing solver options via GAMS by anamileva in https://github.com/blue-marble/gridpath/pull/881
* **Feature**: Fuel production and storage by anamileva in https://github.com/blue-marble/gridpath/pull/880
* **Feature**: Support for candidate fuel production and storage projects by anamileva in https://github.com/blue-marble/gridpath/pull/895
* **Feature**: Implement minimum fuel burn requirements by anamileva in https://github.com/blue-marble/gridpath/pull/898
* **Feature**: Direct air capture projects by anamileva in https://github.com/blue-marble/gridpath/pull/899
* **Feature**: Project cap factor limits by anamileva in https://github.com/blue-marble/gridpath/pull/900
* **Bugfix**: Fix bug in project reserve requirements related to project operating timepoints by Janie115 in https://github.com/blue-marble/gridpath/pull/901
* **Feature**: Stage-dependent market participation by anamileva in https://github.com/blue-marble/gridpath/pull/902
* **Maintenance**: Require Werkzeug==2.0.2 [8850a2e](https://github.com/blue-marble/gridpath/pull/905/commits/8850a2eb81d20440cbb11241cc3c2bacbf1607f6) and Pin Jinja2 to 3.0.3 [45e8104](https://github.com/blue-marble/gridpath/pull/905/commits/45e8104b26df83c75c54bcbedd41244e092ceea8) by anamileva
* **Bugfix**: Don't convert None to NULL string [bcf2599](https://github.com/blue-marble/gridpath/pull/905/commits/bcf25994ebe46ec7702cbe374d115d4512311878) by anamileva

**Full Changelog**: https://github.com/blue-marble/gridpath/compare/v0.12.0...v0.13.0

This release includes major new functionality including:
* Support for running subproblems in parallel and skipping E2E steps
* Support for horizon-level energy targets
* Support for flexible-duration periods
* Carbon tax
* Hybrid projects

There are several changes that require minor updates to the database structure and CSV files from prior versions.