Add readme

Close #8

CHANGELOG.md

@@ -5,6 +5,7 @@
 - make the directory where sessions are stored configurable
 - support only Tmux v1.9 or greater
 - display a nice error message if saved session file does not exist
+- added README
 
 ### v0.0.1, 2014-08-26
 - started a project

README.md

@@ -1,4 +1,40 @@
 # Tmux Session Saver
 
+Enables saving and restoring of tmux sessions.
+
+### Key bindings
+
+- `prefix + M-s` - save
+- `prefix + M-r` - restore
+
+### 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-session-saver  \
+    "
+
+Hit `prefix + I` to fetch the plugin and source it. You should now be able to
+use the plugin.
+
+### Manual Installation
+
+Clone the repo:
+
+    $ git clone https://github.com/tmux-plugins/tmux-session-saver ~/clone/path
+
+Add this line to the bottom of `.tmux.conf`:
+
+    run-shell ~/clone/path/session_saver.tmux
+
+Reload TMUX environment:
+
+    # type this in terminal
+    $ tmux source-file ~/.tmux.conf
+
+You should now be able to use the plugin.
+
 ### License
 [MIT](LICENSE.md)