starting work on reusing the parser dictionary for the element and

* SAX2.c include/libxml/parser.h: starting work on reusing the
  parser dictionary for the element and attribute tag names.
  Add pools for Element and Attributes in the parser context,
  which should help speeding up the reader.
* Makefile.am result/*.rdr : adding non-python reader regression
  tests.
Daniel
diff --git a/result/svg1.rdr b/result/svg1.rdr
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