Update tags.rst
lost block in validation.rst
update API
Update volt.rst
Merge pull request #93 from xboston/patch-1

Update tags.rst
Merge pull request #94 from xboston/patch-2

lost block in validation.rst
Merge pull request #95 from xboston/api-26

update API
Merge pull request #96 from xboston/patch-3

Update volt.rst
Обновление документации