continued fractions functionality enhanced and added to ntheory module
solved code convension errors & error raising functionality changed
global variable removed
modified the function continued_fraction_rational_number(numerator, denominator)
continued_fraction_rational_number function modified. Doctest errors resolved.
pep8 for tests
reformat references and examples
Cleanup imports
Remove an arbitrary convergents restriction
continued_fraction_rational_number -> continued_fraction_iterator
continued_fraction_periodic() to handle quadratic irrational numbers
Remove continued_fraction, add tests
Add sympy.ntheory.continued_fraction to sphinx docs
Add exports for continued_fraction* to sympy.ntheory
Remove continued_fraction implementation from physics module
Merge pull request #1 from skirpichev/continued_fractions-dammina

Continued fractions for dammina
test: Add external test for ufuncify() order of arguments

See issue 2971 at https://github.com/sympy/sympy/issues/2971
autowrap: correct order of arguments, fix #2971

Someone needs to have a look at this, as I am not sure what this 'm' is
all about.
fix docstring of is_zero()
update docstring is_zero