Release Version 2.3 (#47)

Release Version 2.2 (#44)

Release xsct 2.1 (#42)

Release xsct 2.0 (#38)

[xsct 1.9] Fix issue #32 by adding linear brightness parameter (PR #33)

Add second argument: Linear brightness

Usage:
```sh
./xsct 4000 0.5 && ./xsct
```

Fixes #32 .

Release v1.8.1 (#31)

Allow Makefile default settings to be overridden by environment
variables; patch contributed by Ionic

Add CLI options for screen and CRTC selection (#28)

- Add options for screen and CRTC selection.
- Address #25 .

Release xsct 1.7

Create version 1.6.1 (#22)

Create version with $(DESTDIR) installation path prefix in Makefile:
#20
Fixes: #21

Implement Delta-Mode (#18)

Adds support for delta-mode that shifts the temperature of screen by the
given argument.