Options for ctags

When pretty printing to JSON with universal ctags the following fields are printed by default (see man page for `ctags` what stuff means):

* name
* path
* pattern
* file
* typeref
* kind
* scope
* scopeKind

It might be good to figure out which fields are useful. It could very well be that some files are not very useful, while others are missing. Some that I think might be good to include (with the `--fields` parameter):

* line (line number information)
* access

although there can be others, depending on the language. I am not sure if all the default tags should be included.