Add controller tests for videos#show and videos#search
Add controller tests for authentication
Add controller tests for authentication (sol)
1. add some missing test case.
2. change some describe wording for more readable
3. change some matcher for more suitable
4. correct session destroy http action from delete to get (but they
both worked.)
using find_by_id for preventing raise error. when browser keeped session data, but user have been deleted
Add video reviews
refactoring: assigns @reviews variable in GET show video controller
correct rating range from 0..5 to 1..5
1. User can review a video. 2. list all review in video show
Merge pull request #3 from sinorga/week2

Week2 part 1