Merge pull request #7 from Kapitoha/master

Changed some JDInstance classes and created new markable interface
Merge pull request #8 from Kapitoha/master

Запись в базу
Merge pull request #9 from Kapitoha/master

Added new Opinion instance which contains user's id, question's id and a...
Merge pull request #10 from Kapitoha/master

Created (full) Opinion Poll engine which allows to vote for particular a...
changes in views. Index page + surveys
translate into english. added referenses into navbar