Added resource for trait values

Added migrations and associations
still need controller and model methods
Add actions for synchronous import and resetting job
Make attributes accessible for creation of trait values
Implement reset method
Implement importing of trait values
Add reset and import (synchronous) button
Remove position from continuous trait
Add routes for import and reset_job
Schema updates to remove position
Implement simple controllers for categorical traits
Fix missing @ on otu
Add method to get categorical_traits from Otu
Link to OTUs from taxa show
Fix leftover Taxon references in otus.show
Add navbar items for data
Skip taxon.name if empty
Deleting user before installing with devise
Install devise
Installed devise User model

Replaces original user model
Remove access_controller and manual auth
replace :confirm_logged_in with :authenticate_user
Implement support for OpenID via omniauth

Based on documentation at
https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview