make it compile in linux, add linux binary

binding.cpp

 #include <v8.h>
 #include <node.h>
 #include <string>
+#include <cstring>
 #include <cstdlib>
 #include "libsass/sass_interface.h"
 

binding.gyp

@@ -21,6 +21,11 @@
           'xcode_settings': {
             'GCC_ENABLE_CPP_EXCEPTIONS': 'YES'
           }
+         }],
+        ['OS=="linux"', {
+          'cflags_cc': [
+            '-fexceptions'
+          ]
          }]
       ]
     }