Add readme

Author: Bruno Sutic

CHANGELOG.md

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 ### master
 - initial work on the plugin
+- add readme

README.md

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+# Tmux sensible
+
+A set of tmux options that should be acceptable for everyone.
+
+Inspired by [vim-sensible](https://github.com/tpope/vim-sensible).
+
+### Principles
+
+- `tmux-sensible` options should be acceptable to **every** tmux user!<br/>
+  If any option bothers you, please open an issue and it will probably be
+  updated (or removed).
+- if you think a new option should be added, feel free to open a pull request.
+- **no overriding** of user defined settings.<br/>
+  Your existing `.tmux.conf` settings are respected and they won't be changed.
+  That way you can use `tmux-sensible` if you have a few specific options.
+  See [feature section](#example-feature) for an example.
+- [source code](https://github.com/tmux-plugins/tmux-sensible/blob/master/sensible.tmux)
+  is the authoritative documentation.<br/>
+  It's really not that scary and you should have a look, even if you're a
+  tmux beginner.
+
+### Goals
+
+- group standard tmux community options in one place
+- remove clutter from your `.tmux.conf`
+- educate new tmux users about basic options
+
+### Example feature
+
+Sets tmux prefix to `Ctrl-a`.
+
+    # set prefix to `Ctrl-a`
+    tmux set-option -g prefix C-a
+    tmux unbind-key C-b
+
+Since user defined `.tmux.conf` settings are respected, if prefix is set to
+`Ctrl-z` - it won't be overriden!
+
+### Installation with [Tmux Plugin Manager](https://github.com/tmux-plugins/tpm) (recommended)
+
+Add plugin to the list of TPM plugins in `.tmux.conf`:
+
+    set -g @tpm_plugins "             \
+      tmux-plugins/tpm                \
+      tmux-plugins/tmux-sensible      \
+    "
+
+Hit `prefix + I` to fetch the plugin and source it. That's it!
+
+You might also want to restart your tmux server, just in case.
+
+### Manual Installation
+
+Clone the repo:
+
+    $ git clone https://github.com/tmux-plugins/tmux-sensible ~/clone/path
+
+Add this line to the bottom of `.tmux.conf`:
+
+    run-shell ~/clone/path/sensible.tmux
+
+Reload TMUX environment:
+
+    # type this in terminal
+    $ tmux source-file ~/.tmux.conf
+
+You might also want to restart your tmux server, just in case.
+
+### Other goodies
+
+You might also find these useful:
+
+- [copycat](https://github.com/tmux-plugins/tmux-copycat)
+  improve tmux search and reduce mouse usage
+- [pain control](https://github.com/tmux-plugins/tmux-pain-control)
+  useful standard bindings for controlling panes
+
+### License
+
+[MIT](LICENSE.md)