Merge pull request #263 from DaveAppleton/master

assert is now built in

contracts/SafeMath.sol

@@ -45,9 +45,4 @@ library SafeMath {
     return a < b ? a : b;
   }
 
-  function assert(bool assertion) internal {
-    if (!assertion) {
-      throw;
-    }
-  }
 }