Refactor routes for better maintainability ...

- Remove redundant routes (Fixes #1699, Fixes#1570)
- Remove redundant actions
- Remove redundant policy methods
- Fix invalid actions (public methods defined on controllers)
- Set concern methods as private
- Extract session locale method from ApplicationController into its own controller
- Explicitly define actions in statics controller for better readability

Replace YARD documentation with Tomdoc ...

These changes use the YARD gem, but in the lighter Tomdoc format.

You can read more about Tomdoc here: https://tomdoc.org

config/initializers/locale.rb getters/setters pointing at FastGettext. en-UK renamed to en_GB. DMPRoadmap/roadmap#98

URLs without locale param

Merging current stable development branch into master (#23) ...

This is our unofficial v.0.1.0 release. It includes:
- Rails 4.2 migration
- Internationalization
- API
- Institutional logo upload (thanks to Weiwei and the Univ. of Alberta)
- Generic branding
- General cleanup of code and bug fixes