Add Active / Inactive metadata component to recognize companies that have verified their data within a specific time frame

[ianedlind]

Purpose: Associate implications with the verification process (see issue #34) created to solve the stale, incorrect company data.

Verified within the past 6 months = Active
Verified more than 6 months - 1 year = Inactive
Verified more than 1 year ago = Remove company from site (logical delete)

Still need to flush out:

• Active / Inactive filtering functionality for site users?
• How is this data displayed on a company detail page?