Admins of ctnrs can now edit ctnrs without having to change their current ctnr
Add description field to Range
Migrate range comment as description
Add help_text to Range.description
`name` = first 50 chars of first line of comment

Still put the entire comment in `description`.
Add migration
Modify stringifiers; add 'name' to detail view
Move 'name' column to the left of 'range' column
Add Network.allow_voip_phones field
Put VoIP networks in the "VoIP" VRF
Remove extra table cell from range detail view
Refactor suggested by @zeeman
added cached_property decorator
rewrote tablefy as a class
Merge pull request #448 from drkitty/table-fix

Remove extra table cell from range detail view
Merge pull request #449 from murrown/tablefication

Tablefy rewrite
Remove migration

It might be out of date by the time we merge.
Remove migration (it's out of date)
Improve CLI disallowed attribute error

(The web UI has its own error, which might need improvement but is
unrelated.)
combined static and dynamic interface view