Fix issue #879: series of undefined functions.
Issue 879: add test for series of a subclass of Function.

Now we can use also

    >>> class TestF(Function):
    ...     pass
    >>> TestF(x).series(x)
Issue 879: fix python3 failure.
Added dot product tests from different frames.
Minor Fix.
Added print statements and modified assertion tests
Added correct print statements
Assertion tests satisfying new trigsimp changes
Addition of hypertangent and exponential cases to parametric differntial equations

 added code exponential for to special denom

added code for tangent cases to special denom

added code for tangent cases to special denom

First attempt to solve the section 5.12

first attempt to solve section 5.12 and related problems

First Attempt to implement section 5.12 and related problems

added hypertangent test cases for param special

deleted binary file
3128: Sum/Product Simplification.
Simplification now hooked to simplify.
A bug fixed. Tests updated.
Tests updated.
Code quality improved.
Merge conflicts fixed.
Test failures fixed.
Removed two redundant tests.
Changed the Algorithm.
Simplification is now order independent.
Removed unused imports