Configurable parameters for intake page

This allows users to customize which fields appear on the Server Intake
page by defining them in the configuration file
Removing configs from dev_base and adding to intake reference
Merge branch 'box-intake-page' of github.com:box/collins into box-box-intake-page
keep rack_position first, and keep it focused
Merge pull request #172 from tumblr/box-box-intake-page

Configurable parameters for intake page deux