DOC: Update changes for 4.17

Update changes

DOC: Fix broken links

Fix incorrect links

Merge pull request bashtage#226 from bashtage/add-appveyor

TST: Add smoke decorator and appveyor

BUG: Fix error in test

Fix missing impot

TST: Remove test on Windows 32

Remove test that fails with small margin on Windows 32

MAINT: Set to binary distribution

Set to binary distribution

Merge pull request bashtage#225 from bashtage/add-more-r2

ENH: Add system R2 measures

Merge pull request bashtage#218 from bashtage/final-panel-removal

MAINT: Remove pd.Panel

DOC: Final update for 4.13

Finish doc update

Merge pull request bashtage#198 from bashtage/finish-testing-singleton

BUG: Fix small bugs due to singleton dropping