implemented search by title function in Video model via TDD
Added one more test case for search by title
Added one more test case for search by title. returns empty array when search term is an empty string
Updated implementation of search by title to return videos in created_by descending order
Implemented search by title functionality
Implemented search by title functionality
Implemented display recent videos and test for category.
Updated seed data for dev and test
Implemented user register, sign in and sign out functionality
Updated header menu for sign in out functionality
Implemented authenticate user
redirect to home path from sign in page if already signed in. Changed user variable to local variable.