Implemented Video.search_by_title and associated tests
used before action to seed database - cleans up the tests.  Also broke up one test into two having to do with searching for items with spaces in their names
Added ordering of search results and handling of nil input arguments for search
Merge branch 'video_search_by_title'
Implementation of the search_by_title method in the Video model. Plus tests associated with the search.
Plus some refactoring of the testing logic to leverage the .json file for populating a sample
data set.