Numbakit-ode

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- Nothing changed yet.

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- Implemented events.
- Implemented interpolator for RungeKutta23, RungeKutta45, DOP853.
- Added NO_NUMBA variable to nbcompat.
- Implemented bounded bisect method for root finding.
- Several bug fixed and code clean up.
- Improvements to the documentation, packaging and testing infrastructure.

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- Moved t_bound check to Solver class.
- Created ALIAS API to allow multiple names for solvers while keeping
a preferred one.
- Changed import system in module..
- Reorganized solvers into multistep and rungekutta.

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- Improved public API: skip / step / run

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- Tidy up part of the public API.
- Renamed some variables in internal methods for consistency.
- Improved docstrings.
- API to handle the first step in higher order fixed step methods.

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- First public release.