Improve CLI disallowed attribute error

(The web UI has its own error, which might need improvement but is
unrelated.)
Import a thing; print attribute name, not pk
Added range_type to range table
Ranges and Networks in dropdowns are now displayed in a monotype font:
Ip_str is now a monotype font in forms
Merge branch 'master' into church29
align columns of range strings in forms
Columns in tables can be set to use a monotype font
Improve UI error message
Merge pull request #451 from drkitty/friendly-eav-errors

Improve disallowed-attribute errors
Removed monotype from tables
Merge pull request #16 from murrown/church29-monotype

Align start and end strings as columns.
Merge pull request #466 from church29/Monotype_Range_Network_Dropdown

Ranges and Networks in dropdowns are now displayed in a monotype font
replace S and D in range table type column with static and dynamic
Merge branch 'Range_Type_Table' of https://github.com/church29/cyder into church29-Range_Type_Table

Conflicts:
	cyder/cydhcp/range/models.py