Make an interface to allow installation of color schemes, similar to graphic packs.

[Issue created by Pidgeot: 2014-07-18]
[Last updated on bitbucket: 2014-08-17]

[Comment created by Pidgeot: 2014-08-17]
Color scheme selector and preview (fixes #1)

→ <<cset 315754c902df>>

[Comment created by PeridexisErrant: 2014-08-17]
The Manilla DF launcher has one of these, and the (java) source is available on request. Probably not relevant, but I though it worth mentioning.