Add note about usemap/ismap. Fixes #171
Add a note about behavior for invalid markup. Fixes #165
Merge pull request #207 from zcorpan/fix-171

Add note about usemap/ismap. Fixes #171
Remove old issues
Merge pull request #208 from zcorpan/fix-165

Add a note about behavior for invalid markup. Fixes #165
Remove old issues
Fix conflicts
Merge pull request #209 from zcorpan/remove-old-issues

Remove old issues