update url for hsb2 dataset
DOC: Fix indent and add missing params to linear models. Closes #709.
Merge pull request #727 from jseabold/fix-709

DOC: Fix indent and add missing params to linear models. Closes #709.
Merge pull request #698 from gbadge/update-hsb2-url

DOC: Update url for hsb2 dataset
DOCS: Parameter -> Parameters section
DOC: Add orphan tag to contrasts to silence warning
DOC: Fix link. No reference in pandas objects.inv to isnull
DOC: Fix reference
Merge pull request #729 from jseabold/docs-cleanup

Get rid of warnings in docs build
BUG: Fix optimization for full_output = False
STY: Clean up commented out code
TST: Test fit funcs for full_output = False
Merge pull request #730 from jseabold/fix-opt-fulloutput

BUG: Fix opt when full_output=False. Closes #450.
MAINT: Use virtualenv correctly
Merge branch 'fix-update-web'

* fix-update-web:
  MAINT: Use virtualenv correctly
ENH: Handle wrapped results. Closes #715.
TST: Test regression plots with pandas. Closes #716.
Merge pull request #731 from jseabold/handle-wrapped

Handle wrapped results. Closes #715 and #716.
BLD: Check for patsy dependency at build time + docs
Merge pull request #732 from jseabold/patsy-dependency

BLD: Check for patsy dependency at build time + docs. Closes #588 and #549.