This makes it possible to actually see the function names in
stacktraces. It also means that the internal objects of some of the tag
prototypes don't need to be public any more.
Exuberant Ctags:
- ObjectiveC
Universal Ctags:
- Ada
- Autoconf
- Automake
- Ctags config
- D
- Elm (courtesy of @bitterjug)
- Go
- ObjectiveC
- Perl 6
- Protobuf (closes#437)
- R
Also various improvements to existing definitions based on changes in
Universal Ctags.
Added scopes, so tagbar will show the following hierarchy:
```
namespace
subnamespace
...
class
property (variable)
...
method
...
```
Additional kinds added (basically the same as #283):
* namespaces
* use aliases (imports)
* traits
