Tagging v1.7.0, an intermediate release with large code and unit test…

… cleanup but minimal changes to code interfaces.

Tagging v1.6.0. More user control of simulation time resolution, fixe…

…s to time integration.

Tagging v1.5.0. Updates to SNEWPY model initialization.

Tagging v1.4.0. Unit test fixes.

Tagging v1.3.0. Cleaned up SNEWPY interface, added analytic fluence c…

…alculations.

Tagging v1.2.0. Updates to significance calculation, deadtime fixes, …

…background calculation.

Tagging v1.0.0. Full simulation handling.

Functional version: detector hits.

Development tag v0.1.0