Status dot colour configuration

[tpgillam]

Currently the status dots in the summary are red & green for failure & success, respectively.

It would be nice to allow the colour to be configured to some degree. This would be especially helpful for those users who cannot easily distinguish red & green.

I'm not sure if it is possible to automatically mirror GitHub's theme, and e.g. use the same colours that would be used in the UI for adding and deleting code? That would be quite neat.

[orgoro]

v3.1 includes this as a config