ENH: using python's warnings instead of prints in fitpack.

When fitpack detects a recoverable problem, it will signal it with
a RuntimeWarning instead of printing to stdout. This way the output
can be programatically silenced or made exceptions.
MAINT: remove some inf-related warnings from logsumexp
MAINT: mis-parenthesization
ENH: Wrap blas level 2, syr and her routines
ENH: Wrap blas level 2, syr2, her2 routines

Conflicts:

	scipy/linalg/tests/test_blas.py
Merge pull request #3984 from ewmoore/wrap_blas

Wrap her, syr, her2, syr2 blas routines
DOC: stats: fix whitespace in docstrings of several distributions

[ci skip]
Merge pull request #4020 from ev-br/loglaplace

DOC: stats: fix whitespace in docstrings of several distributions
PEP8: putting back print_function for uniformity
DOC: indicating the deprecation of the parameter quiet
Merge pull request #4003 from Dapid/warnings

ENH: using python's warnings instead of prints in fitpack.
Merge pull request #4016 from argriffing/logsumexp-warnings

MAINT: remove some inf-related warnings from logsumexp
In dendrogram(): Correct an argument name and a grammar issue.
Merge pull request #4024 from cbrueffer/misc

In dendrogram(): Correct an argument name and a grammar issue in the docstring.