Issue 3587: Modified Rational.__mod__ by adding a extra test to
            determine whether self.evalf() is a Float.
Issue 3587 : evalf() called once only. Removed extra elif cluase.
             Added test case.
Travis: Add support for testing in Python 3.3
Travis: fix bash syntax error
Fixed the wrong return value in Rational.__rmod__
Merge pull request #1711 from certik/py33

Travis: Add support for testing in Python 3.3
Issue 3428: Passed tolerance to _real_to_rational if rational=True in nsimplify and implemented it.
issue 3428: fixed trailing whitespace error in test_simplify.py
Merge pull request #1709 from prasoon2211/issue-3587

Issue 3587: Modified Rational.__mod__ by adding a extra test to determine whether self.evalf() is a Float.
Add Prasoon Shukla to AUTHORS/aboutus/.mailmap. Welcome to SymPy!
Refactored code to forbid exceptions
Merge branch 'master' of https://github.com/sympy/sympy into issue-3428
Fixed merge conflicts