Moves db.serial() test to new framework
Moves multi-key model tests to new framework
Disabled usage of process.hrtime() in hook test

It seems the timing is failing somehow.. I noticed on Travis and now on
my machine under heavy load
Moves test for single property hook to new framework
Moves hasMany autoFetch test to new framework
Moves hasMany extra properties tests to new framework
Moves number property size test to new framework

Last old test!
Deprecates old folder, moves new tests to real folder, removes deprecated dev dependencies
Removing old tests