updated db schema, router, , set up basic controllers, empty models
added default value to db schema
renamed default-header to default-banner
added express-form2 and emailjs to packages
added empty Url model and removed useless models
added validations about news and temp regex lib
added validations about artists
modified db schema
syntax tuned
modified db schema
fixed lang path in validations lib about artists and news
added validations about releases
added validations about releases, fixed lang path
added validation rule to validation about releases
syntax tuned
added validations about live, modified db schema about live
added validations about videos, modified db schema about videos
syntax tuned
added validations about contact
minor modified class path of admin controllers