makefile and CoC (#1741)

* * add makefile for build

* use io.ReadFull instead of io.Reader's Read()

* add CoC(K)

* fix typo

CODE_OF_CONDUCT.md

@@ -0,0 +1,30 @@
+
+**You have been visited by the CoC(K)**
+
+
+                                           _.+._              
+                                         (^\/^\/^)            
+                                          \@☆@☆@/             
+           CoC(k)                         {_____}             
+        Code Of Conduct Killer           _oOPPYbo.            
+                                   _,ooO8O'    `Ob            
+                             _,ooOPP"'  Ob      dO            
+                        _oooOP"''       `Oo.   ,O[            
+       Ob         _,ooOPP''               `YYboOP             
+      `O[     _ooOP"''                  _,oOPP"'              
+       YOooooOP'                    _ooOP"'                   
+         ''                     ,ooOP''                       
+                            ,odPP''                           
+                        _,oOP'                                
+                     ooOP"'                                   
+                  _oOP'o                                      
+                 ,OP   YOL                                    
+    ,O.         ,OP      Yb     contribute code or you're a racist    
+    dO'          "        Yb    get offended as a responsible adult
+    ]O.                   dO    spread this like happy herpes    
+     Ob        _,o.      dOP    
+     `Ooo___ooOP'`YbooodPP      just imagine what would happen
+       '`"""''     `'''         if we all decided to understand
+
+
+Sweet blessing be upon you but **ONLY** if comment `ebin` to this commit.