Major redesign of the build system. Also allow icons to be installed optionally:
-DQUASSEL_ICONS=External
Will install Quassel's own icons to $PREFIX/share/apps/quassel rather than into the binary itself
-DOXYGEN_ICONS=External
Will not install our Oxygen subset into the binary and rely on them being installed externally instead
Build system is still work in progress, and I have likely b0rked building on Win and Mac.
- [DH] icons/hicolor/22x22/apps/quassel.png
- [DH] icons/hicolor/22x22/apps/quassel_disconnected.png
- [DH] icons/hicolor/22x22/apps/quassel_newmessage.png