update doc

Signed-off-by: Namhyung Kim <namhyung@gmail.com>

Author: namhyung

LICENSE

@@ -0,0 +1,22 @@
+Copyright (c) 2017-2018  Namhyung Kim <namhyung@gmail.com>
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -4,3 +4,32 @@ DAS - disassembler
 DAS is a wrapper of disassembler (`objdump -d`) which support user interactions on terminal.
 
   https://github.com/namhyung/das
+
+![screenshot](https://github.com/namhyung/das/blob/master/screenshot.png)
+
+
+Usage
+-----
+
+    $ das <program>
+
+It supports following keys
+
+ * UP/DOWN/PGUP/PGDOWN/HOME/END: move cursor
+ * ENTER: fold/expand a section or move to a function
+ * ESCAPE: return to previous function
+ * `v`: toggle "raw" mode
+ * `l`: list functions
+ * `q`: quit
+
+
+How to install
+--------------
+If you have golang environment setup:
+
+    $ go get github.com/namhyung/das
+
+Or, just download the binary:
+
+    $ wget https://github.com/namhyung/das/releases/download/v0.1/das-linux-amd64
+    $ sudo install -D das-linux-amd64 /usr/local/bin/das