Merge remote-tracking branch 'blessed/master'

* blessed/master: (75 commits)
  added exec command to docker plugin
  Quote path in case $HOME has a space in it.
  Update the list of Heroku Postgres commands
  fix(tools/check_for_upgrade): Don't source profile
  Fix aws.plugins.zsh check rule
  Revert PR #3359 as this is breaking stuff for many folks. Need to rethink how we handle system defaults differently on this
  Updated Yii2 command completion
  added node- before node version for consistency
  mira theme shows active node, ruby and java versions
  Add yii2 readme
  Added Yii2 command completion
  Change to alias and remove deprecated GREP_COLOR
  Tidy up the grep.zsh library
  Use unaliased grep in flag check
  Ignore .bzr folders in grep too
  Extract VCS folders definition to avoid repetition
  Add itunes shuffle command to OSX plugin.
  Fixed output issues webith websearch plugin.
  Fix dircycle plugin
  add current bookmark to rkj-repos theme
  ...

plugins/tmux/tmux.plugin.zsh

@@ -5,6 +5,8 @@
 alias ta='tmux attach -t'
 alias ts='tmux new-session -s'
 alias tl='tmux list-sessions'
+alias tksv='tmux kill-server'
+alias tkss='tmux kill-session -t'
 
 # Only run if tmux is actually installed
 if which tmux &> /dev/null