WIP: Patch ctags to index vala code
This patch of ctags enable to index vala code though tags
Is based on https://github.com/universal-ctags/ctags/pull/2325, which comes from Anjuta.
It is not getting upstream as ctags maintainer is reluctant to include a dependency to parse a language. In this case the dependency is vala itself, which provides a Vala Parser.
Meanwhile a vala parser without vala dependency is implemented, this could help to move around or autocomplete vala projects.
Not sure if any further changes than include vala in ctags.plugin
is needed for this to work.