Merge pull request #80 from jrunningen/master

Display indices for person collections on the main form
Move "Remove person" checkbox to the top of each person

Fixes #54
Use date_field for date of birth
Use a colection_select for marital status

Possible values are based on the US census.

Fixes #50
Consistently left-align Hedin House name fields
Use consistent label casing in the main form