import.rake updated to use template csv files instead of sheet csv files
HABTM checkboxes see railscats
Merge pull request #49 from MargaretLangley/master

import.rake updated to use template csv files instead of sheet csv files
debit period gives error message if it cannot find the matching period. spec added for period happy path.
Invoicing show & tests update
Merge branch 'master' of github.com:MargaretLangley/letting