Better build options

Including setting the program version based on a git tag.

Resolve env vars

Typo

Simplified

Typo

New build badge

Rationale

Style nits, and a note

Support icons, more tests

Properly sort by Label, alter test data for this

DRY this bit up

Version bump

Don't try to use bad data from YAML, print a warning when needed

Bad data from YAML is ignored, and if no usable data is found then a
warning is printed to give the user a clue about what's wrong.

I also broke some more code out of the cli Action definition to make
testing easier.

And finally, I added the 'reallybad.yml' file which has no usable
data, for testing.

Version bump

Build status

New codebase, new build

Tests

Header

It's better to do here

Missing steps, usage