feat: screenshots of problems pages

Signed-off-by: A. Prooks <aprooks@live.ru>
Set base_api to /api/v1/content-delivery

To isolate resources from each other in the 
education project.
Update grunt connect task with new api root url
fix app.config dependencies
Fix missing dependencies in app.sidebar
Merge pull request #26 from dinoboff/api-base

Set base_api to /api/v1/content-delivery
Adds assets

Grunt cannot be a requirement for the education
project if it has to run in the python nitrous.io
build.

Also, bower best practice is still commit built
files with the repository.
Merge pull request #27 from dinoboff/api-base

Adds assets
Fix templates path

Should be relative to current location
Merge pull request #28 from dinoboff/api-base

Fix templates path
Fixes link to video create form

should be a relative link
Merge pull request #29 from dinoboff/api-base

Fixes link to video create form
Change postAnswer path to include the problem id
Merge pull request #30 from dinoboff/api-base

Change postAnswer path to include the problem id
Update AnswerPayload schema
Parse answer to integer
Merge pull request #31 from dinoboff/fix-post-answer

Update AnswerPayload schema
Fix answer call
Fix it again
Update the test