thcrap_configure: Support patch dependencies

[nmlgc]

Patch dependencies

Description

More connection between the individual patches.

For example, translation patches into Arabic or Hebrew could depend on a shared patch adding support for right-to-left text. In this case, the user would not have to bother downloading both base_tsa and, let's say, script_rtl, but these would be immediately added and stacked below the translation patch, if they aren't already there.

Also, we could split off the font settings and font files currently bundled in base_tsa into an own patch (script_latin).

Prerequisites

We'll probably wait for #8 (GUI configuration tool) before attempting something like this.

Implementation

[nmlgc]

This will also be highly useful for language variety patches like lang_en-gb and lang_de-ch.