igcd, ilcm: accept list of integr
Merge master
return 1 if gcd is 1
watch for nsimplify making number 0
Change all the "assert Eq" tests to proper tests.
MatrixBase.is_zero supporting None results.

Extended original implementation of MatrixBase.is_zero to return None if the
matrix may or may not be a zero matrix.  Also found a workaround to issue 4114
to have this method accessible to ImmutableMatrix.

See http://code.google.com/p/sympy/issues/detail?id=4114
plot functions now pass on kwargs when constructing series.
Merge pull request #2670 from jrioux/tests

Change all the "assert Eq" tests to proper tests.
Merge pull request #2638 from smichr/4112

watch for nsimplify making number 0
Merge pull request #2637 from Tempel/matrix_is_zero

MatrixBase.is_zero supporting None results.
Don't set the doctest encoding

This breaks when sys.__stdout__ is None, which can happen on Windows. It is
not needed anyway because the stdlib doctest already does the same thing.

Fixes #2681. Thanks to Vivek Mohta for the report.
Merge pull request #2388 from shikil/gcd

igcd(*[5, 10, 15])
Improvements to IPython printing: strings, floats, and ints.

Removed strings from LaTeX printing in IPython as this was causing dictionaries
that contained strings and other valid LaTeX printable types to render. This is
typically not desirable especially if you have a dictionary with only strings,
floats, and integers.

I also added an option `print_builtin` to `init_printing` that allows you to
disable the float and integer LaTeX printing. For example, if you don't want a
dictionary of integer keys and float values to render in LaTeX.

Fixes issue #2672.
Bump version to 0.7.4.1
Fix the release script to work with versions like 0.7.4.1
Add newline when updating releases.txt
Make test_pypi work with ints
Merge branch 'master' into 0.7.4.1

Conflicts:
	sympy/__init__.py
Additional notes in doc string about line wrapping.
Merge pull request #2684 from sympy/0.7.4.1

0.7.4.1