Make directly jumping to file at single match optional

[a3f]

Currently the behavior for "navigate_to_definition" (Ctrl-t, Ctrl-t by default) is jumping to the definition, when there is only one tag that matches. If there is more than one tag, a tag panel is shown.

As the tag panel displays the declaration too, a jump to the definition is often unnecessary. Making this behavior adjustable through a "jump_single_match"-Option in the configuration file would be nice.

Sadly, my fix doesn't quite work like it should, so I can't request it to be merged. But here it is:
https://github.com/a3f/CTags/compare/SublimeText:development...development