Hissw

What's Changed
* Add filter to force preservation of precision in floating point values by wtbarnes in https://github.com/wtbarnes/hissw/pull/32


**Full Changelog**: https://github.com/wtbarnes/hissw/compare/v2.2...v2.3

What's Changed
* Add filter for passing lists of strings by wtbarnes in https://github.com/wtbarnes/hissw/pull/30


**Full Changelog**: https://github.com/wtbarnes/hissw/compare/v2.1...v2.2

What's Changed
* Fixed a bug in loading scripts from files by wtbarnes in https://github.com/wtbarnes/hissw/pull/27
* Allow headers and footers in IDL environment by wtbarnes in https://github.com/wtbarnes/hissw/pull/28

**Full Changelog**: https://github.com/wtbarnes/hissw/compare/v2.0...v2.1

What's Changed
* Added default filters for passing in `Quantity` objects and computing log10 by wtbarnes in https://github.com/wtbarnes/hissw/pull/21
* The `'ssw_home'` variable is now exposed in all scripts by default by wtbarnes in https://github.com/wtbarnes/hissw/pull/22
* Scripts can be run in "IDL only" mode to avoid the need to install SSW by wtbarnes in https://github.com/wtbarnes/hissw/pull/23


**Full Changelog**: https://github.com/wtbarnes/hissw/compare/v1.2...v2.0

This release includes two minor changes:

- If IDL issues a license error, `hissw` will attempt to detect that and raise a `IDLLicenseError`. Previously, `hissw` would just crash because it could not load the nonexistent `.sav` file after the script failed
- The `extra_paths` passed to `Environment` are now appended to the front of the IDL path rather than the back. That means that these paths will take precedence over any existing components of the IDL path.

The main object in `hissw` is now called `Environment`. Previously, it was called `ScriptMaker`.