Fix naming conflicts and tags

[o0th]

This PR fix:

• 273

  using .tmux/plugins/<user>/<repo> plugin's dir structure

• 87

  nothing done here, instead of #branch you can use #tag

• when updating plugins with #branch were not showing

[Nathan-ma]

Thank you! this fixes it all.

[ch3st3r08]

Is there any plans on merging this PR?.

[RossBarnie]

@ch3st3r08 There's very little activity in this repo these days so don't expect it to be merged any time soon.