Spell Smirnov's name properly.
Remove spurious EOL and EOF whitespace.
more stable handling of arguments close to 1
hyp2f1 issue 1561 corrected sign of gamma functions
corrected signs of gamma functions
Merge pull request #2734 from gertingold/issue1561

BUG: special/hyp2f1: more stable handling of arguments close to 1
Merge pull request #2727 from cbrueffer/misc

DOC: stats: spell Smirnov's name properly.
DOC: HACKING: add instructions for debugging compiled code
DOC: remove outdated TOCHANGE.txt
DOC: remove not so useful Py3K.txt
DOC: move material from README to HACKING, remove outdated parts, and move LATEST to README
[ENH] sparse.linalg.LinearOperator: add +, *, **

Enhances LinearOperator such that they can be
added, multiplied and exponentiated.
[TST] sparse.linalg.LinearOperator: test +, *, **
MAINT,TST: use isintlike and add __pow__ test
MAINT: use subclasses for LinearOperator operations
LinearOperator: make it callable
LinearOperator: catch ValueError and return NotImplemented
BUG: sparse/linalg: fix NotImplemented vs exceptions in __sub__
BUG: sparse/linalg: pep8 fixes
BUG: sparse/interface: improve test coverage + fix a bug in PowerLinearOperator