Consolidate dependencies.

Split into per plugin type package.
Remove unnecessary quotes and curly braces.
Report issue with CyclicShifter lv2 plugin upstream and adjust lv2lint call accordingly.

Remove ProM executable related integration.
Simplify calls to make (builds all things by default if available).
Apply upstream patch to also install vst3 plugins.
Simplify quoting in file.
Do not break long lines.

Add optdepends for the various plugin formats to suggest hosts.
Make the XDG desktop files more compliant with the standard.
Run lv2lint in check() and open upstream ticket about issues.
Minor cleanups.

Upgrading to 1.3. Adding default desktop files for all standalone applications using gendesk.

Upgrading to 1.2. Moving jack, liblo and projectm to optdepends. Adding libglvnd to depends. Adding dssi, ladspa and projectm to makedepends.