Fixed a migration filename issue that was causing an error on DB setup
Abstracted basic manufacturer creation into a before hook, in rspec tests.
Abstracted JSON parsing to a helper method, in rspec tests.
Further refactoring of before hooks in rspec tests. Added a third test for selecting individual yoyo info.
Added test for posting new yoyo to DB.
Can now add yoyos with multiple manufacturers, in the tests.
Yoyo show page now shows manufacturer(s).