Moved reusable functions into util
Cleaned up search file to include new util file
Moved the random search value outside so both dbs search for the same value
Updated comma use
Updated Redis write function to handle hashes rather than sets
Changed all functionality to handle a 'field' field for updating, searching and writing
Updated util insert function to include hash for Redis
Implemented the update test
Added the update test to app.js, to allow users to access it