Create native drupal entities

[BBGuy]

• [x] Create native drupal entities
• [x] Add Simple hierarchical select for selection of role and right taxonomy
• [x] Add range for usage fields
• [x] Add usage_weight decimal field to contribution
• [x] Add split decimal fields to contribution representing a percentage that's 0-1 0.5 = 50% (we can change this if we have front end requirements for this to represent 50 for 50%)
• [x] confirm with Darren the type for the split field

[BBGuy]

I have create the following Entities Node Types

• Legal Entity (Machine name: legal_entity)
• Contribution (Machine name: contribution) - we can look at replacing this with a lighter weight entity type at a later stage

Taxonomies

• Right Type (Machine name: right_type)
• Role Type (Machine name: role_type)

Other

• the usage (start end) was implemented using the range module