Make procedures visible in airline integration too.

[surmish]

Describe the solution you'd like In vim-airline integration, only functions/methods are shown. Can you also add tcl procedures to that list.

E.g.

proc test {arg1 arg2 arg3} {
  echo "test proc"                                                                                                                                        
} 

does not show test in the vim-airline statusline.

Describe alternatives you've considered Tagbar integration seems to work fine, but the Vista window is better, airline integration would make it very useful.

[issue-label-bot[bot]]

Issue-Label Bot is automatically applying the label feature_request to this issue, with a confidence of 0.94. Please mark this comment with :thumbsup: or :thumbsdown: to give our bot feedback!

Links: app homepage, dashboard and code for this bot.