mpmath 1.1.0 released

[Fredrik Johansson]

Hi all,

I have just made a new release of mpmath, version 1.1.0. Huge thanks to all contributors! The list of changes is found below.

I'm aware that there are many open issues left, but don't despair; keep the great patches coming, and I will try to make somewhat more frequent releases next year.

Bugs:
* Fixed severe bug in householder() for complex matrices (Michael Kagalenko)
* Fixed frequently-reported bug where findroot() mysteriously raised UnboundLocalError (Sergey B Kirpichev)
* Corrected rounding in binary-to-decimal conversion above 500 digits
* Fixed minor loss of accuracy affecting rf(), ff(), binomial(), beta()
* Fixed incorrect computation of the Hurwitz zeta function in some cases
* Fixed accuracy of digamma function near 0
* Fixed RuntimeError in qfac() in Python 3.7 caused by raising StopIteration (Zbigniew Jędrzejewski-Szmek)
* Fix to allow NumPy arrays in fdot() (Nico Schlömer)

Features and improvements:
* Added more automatic conversions from Fraction, Decimal, NumPy types (Jonathan Warner)
* Support creating mpf from a long literal (ylemkimon)
* Implemented log1p()
* Slight speedup of eig()
* Implement polylog() for general complex s and z by using Hurwitz zeta algorithm as a fallback

Library:
* Test more CPython and PyPy versions (Sergey B Kirpichev, Aaron Meurer)
* Drop support for Python 2.6 and 3.2 (Sergey B Kirpichev)
* Use py.test for test code; lots of code cleanup (Sergey B Kirpichev)
* Corrections to the documentation (Paul Masson, Connor Behan, Warren Weckesser, Aaron Meurer)

Fredrik