Highlight 'yield from' statement

The 'yield from' statement was introduced in Python 3.3. Reported by
Elizabeth Myers.

CHANGES.txt

+Revision 3.3.6 (2013-11-18):
+
+    - Highlight 'yield from' statement introduced in Python 3.3. Reported by
+      Elizabeth Myers.
+
 Revision 3.3.5 (2013-08-31):
 
     - Highlight 'import', 'from' and 'as' as include statements.

README.rst

 - Andrea Riciputi
 - Anton Butanaev
 - Caleb Adamantine
+- Elizabeth Myers
 - Jeroen Ruigrok van der Werven
 - John Eikenberry
 - Marc Weber

syntax/python.vim

 " Language:     Python
 " Maintainer:   Dmitry Vasiliev <dima at hlabs dot org>
 " URL:          https://github.com/hdima/python-syntax
-" Last Change:  2013-08-31
+" Last Change:  2013-11-18
 " Filenames:    *.py
-" Version:      3.3.5
+" Version:      3.3.6
 "
 " Based on python.vim (from Vim 6.1 distribution)
 " by Neil Schemenauer <nas at python dot ca>
 "   Andrea Riciputi
 "   Anton Butanaev
 "   Caleb Adamantine
+"   Elizabeth Myers
 "   Jeroen Ruigrok van der Werven
 "   John Eikenberry
 "   Marc Weber
 syn keyword pythonStatement     exec return
 syn keyword pythonStatement     pass raise
 syn keyword pythonStatement     global assert
-syn keyword pythonStatement     lambda yield
+syn keyword pythonStatement     lambda
 syn keyword pythonStatement     with
 syn keyword pythonStatement     def class nextgroup=pythonFunction skipwhite
 syn keyword pythonRepeat        for while
 syn keyword pythonConditional   if elif else
-syn keyword pythonImport        import from
+syn keyword pythonImport        import
 syn keyword pythonException     try except finally
 syn keyword pythonOperator      and in is not or
 
+syn match pythonStatement   "\<yield\>" display
+syn match pythonImport      "\<from\>" display
+
 if s:Python2Syntax()
   if !s:Enabled("g:python_print_as_function")
     syn keyword pythonStatement  print
   syn match   pythonFunction    "[a-zA-Z_][a-zA-Z0-9_]*" display contained
 else
   syn keyword pythonStatement   as nonlocal None
+  syn match   pythonStatement   "\<yield\s\+from\>" display
   syn keyword pythonBoolean     True False
   syn match   pythonFunction    "\%([^[:cntrl:][:space:][:punct:][:digit:]]\|_\)\%([^[:cntrl:][:punct:][:space:]]\|_\)*" display contained
 endif

test.py

 
 with break continue del exec return pass print raise global assert lambda yield
 for while if elif else import from as try except finally and in is not or
+
+yield from
+
 def functionname
 class Classname
 def функция