Python 3.5 new syntax sugar

https://www.python.org/dev/peps/pep-0492/

syntax/python.vim

   syn match   pythonStatement   "\<yield\s\+from\>" display
   syn keyword pythonBoolean     True False
   syn match   pythonFunction    "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
+  syn keyword pythonStatement   await
+  syn match   pythonStatement   "\<async\s\+def\>" display
+  syn match   pythonStatement   "\<async\s\+with\>" display
+  syn match   pythonStatement   "\<async\s\+for\>" display
+  syn match   pythonStatement   "\<async\s\+with\>" display
 endif
 
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