Add news.md and update version for release

Bumped minor version following header_formatting, terminate_workers,

and multiple bugfixes.

Bumped minor version for release

Fixed bug introduced during merge of absolute_paths branch. Bumped ve…

…rsion to 2.3.1

Bump lyse version and depend on labscript_utils version for a recent …

…a bugfix

Bump minor version for release

Bumped minor version after implementing issue labscript-suite#18.

Merge with Qt

gtk: Fixed use of deprecated attributes when formatting exceptions

Bumped patch version to v1.0.1

gtk: ed docs to xelatex. Added README.md. Added __version__ attribute.