added tmux floating pop up terminal plugin (#134)

README.md

@@ -151,6 +151,7 @@ List of helpful tmux links for various tutorials, plugins, and configuration set
 - [tmux-easymotion](https://github.com/ddzero2c/tmux-easymotion) EasyMotion-like plugin with pane jumping capabilities in tmux.
 - [tmux-filter](https://github.com/MaximilianGaedig/tmux-filter) Filter the current buffer by some text/pattern, very useful for viewing logs.
 - [tmux-fingers](https://github.com/Morantron/tmux-fingers) copy pasting in terminal with vimium/vimperator like hints.
+- [tmux-floating-plugin](https://github.com/lloydbond/tmux-floating-terminal) - A popup floating terminal window in tmux.
 - [tmux-fuzzback](https://github.com/roosta/tmux-fuzzback) Search your scrollback buffer using fzf.
 - [tmux-fzf-url](https://github.com/wfxr/tmux-fzf-url) For opening urls from browser quickly without mouse.
 - [tmux-fzf-session-switch](https://github.com/thuanOwa/tmux-fzf-session-switch) Easy way to switch, when you have a ton of sessions.