Myokit

- Added tests.
- Added `piecewise()` expressions.
- Various improvements and bugfixes.

- Improved import and export interfaces.
- Added `save_state()` method.
- Improved documentation
- Conversion of Myokit expressions to Python functions.
- Added benchmarking methods.
- Implemented unit parsing.
- Added SBML import.
- Added methods for function simplification (via approximations).
- Introduced website.
- Various small bugfixes.

- Added local aliases to syntax.
- Simplified syntax.
- Simulation and gui now allow unlogged pacing.
- Added search function to GUI.
- Templating based exports, available from GUI.
- Import of CellML metadata.
- Added protocol wizard to GUI.
- Added simple component dependency graph to GUI.
- Added model debug options.
- Added matlab export.
- Introduced three-section `mmt` file.
- ABF protocol import.
- Added Sphinx-based documentation.
- Added routine that shows sizes of integrator steps.
- Various small bugfixes.

- First `mmt` syntax, parser and model classes.
- Initial CellML import.
- C++ export.
- Ansi-C export, python export.
- Beat script that uses generated Ansi-C and CVODE, compiled on the fly.
- First working GUI.

- Working on simple model syntax, parser and export to C++.