Added script to call PythonTidy from eclipse. Some changes to PythonTidy to conform to google style.
* To avoid breaking lines with \ :
** Set CAN_SPLIT_STRINGS = True.
** Changes in NodeAsgAttr and NodeAdd.

* Set COL_LIMIT to 78.
* Remove code for substitutions.
* Don't insert template at the beginning of file with SHEBANG etc..