Backport PR #420: Deal with non-finite entries in free-bound continuum (

#420) (#421)

* Fix infs in fb continuum

* clean up

(cherry picked from commit a827e09)

Backport PR #409: Fix warning message formatting for out-of-date dbase (

#410)

Co-authored-by: Will Barnes <[email protected]>

start of 0.7 development

Parse new K&L file format and add v10 support (#392)

* add v10 to supported versions

* refactor klgfb parser; new parser for klgfb_n files

* refactor fb gf for new data format

* fix database urls for v10 and above

* add v10.1 hashes

* fix version checking and test files

* fix scaling of K&L gaunt factor data

* E_scaled bugfix

* add IDL test data for v10.1

* new ssw functions for running v10.1 IDL tests

* minor updates to IDL comparison tests

* update test database file list

* add a developer guide

* add optional v9 test

* update version banner, fix function for reading IDL test data

* update continuum test data with better abundance string

* do version checking for abundance in IDL

start of 0.6 development

Backport PR #397: Fix title of IDL comparison G(T) plot (#398)

Co-authored-by: Will Barnes <[email protected]>

start of 0.5 development

Supply default value for custom pytest commandline arguments when cal…

…ling `getoption` (#389) (#391)

* put everything in one conftest

* Revert "put everything in one conftest"

This reverts commit b002c79.

* supply default values when calling getoption

(cherry picked from commit b85c466)

Add `thermal_energy` property and consolidate base classes (#343)

* consolidate base classes to IonBase

* add thermal energy property

* update paper refs

Backport PR #313: Fix version rendering in docs (#314)

Co-authored-by: Will Barnes <[email protected]>