Biosimulator-processes

This release introduces a series of classes which inherit from the `UniformTimeCourse` step base.

**Full Changelog**: https://github.com/vivarium-collective/biosimulator-processes/compare/v0.0.25...v0.0.26

_What's new?:_
- Fixes an issue with process result retrieval from composite emitter.
- Performs "housekeeping" on existing `TelluriumProcess` and `CopasiProcess` `process_bigraph.Process` implementations.
- Adds `AmiciProcess` to `biosimulator_processes/processes` library.
- Creates and adds `ODEComparator` process to `processes` library for simulator comparison.
- Adds `./compare_api` library which contains the spec and logic for the **Compare** REST API.