update README and add LICENSE file.

LICENSE

@@ -0,0 +1,27 @@
+gopsutil is distributed under BSD license reproduced below.
+
+Copyright (c) 2014, WAKAYAMA Shirou
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+ * Neither the name of the psutil authors nor the names of its contributors
+   may be used to endorse or promote products derived from this software without
+   specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.rst

@@ -1,8 +1,64 @@
 gopsutil: psutil for golang
 ==============================
 
+This is a port of psutil(http://pythonhosted.org/psutil/). This
+challenges port of all
 
+Available archtectures
+------------------------------------
 
+- FreeBSD/amd64
+- Linux
+- Windows
+
+(I do not have a darwin machine)
+
+usage
+---------
+
+::
+
+  import (
+      "github.com/shirou/gopsutil"
+      "fmt"
+      "encoding/json"
+  )
+
+  func main(){
+      v, _ := gopsutil.Virtual_memory()
+
+      // return value is struct
+      fmt.Printf("Total: %v, Free:%v, UsedPercent:%f%%\n", v.Total, v.Free, v.UsedPercent)
+
+      // convert to JSON
+      d, _ := json.Marshal(v)
+      fmt.Printf("%s\n", d)
+  }
+
+The output is below.
+
+::
+
+  Total: 3179569152, Free:284233728, UsedPercent:84.508194%
+  {"total":3179569152,"available":492572672,"used":2895335424,"usedPercent":84.50819439828305, (snip)}
+
+
+Document
+----------
+
+see http://godoc.org/github.com/shirou/gopsutil
+
+
+License
+------------
+
+New BSD License (same as psutil)
+
+
+Related works
+-----------------------
+
+So many thanks!
 
 - psutil: http://pythonhosted.org/psutil/
 - dstat: https://github.com/dagwieers/dstat