integration of sympyprt extension into sympy Part 1
fontsize fix

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
temporary fix for display_formatter problems
Merge pull request #1776 from thisch/sympyprt

Integration of Sympyprt extension from IPyXt into SymPy

This PR integrates the sympyprt extension for prettyprinting sympy expressions in IPython (notebook/qtconsole) into SymPy.