TaxPresenter
Separate ownership table
Updated UserGrowthPresenter
Fixed Contribution specs
Added Transfer model
Moved unit multiplier onto Ownership
Generate correct Ownership units from Transfer
Added Transfer to RailsAdmin
UserGrowthPresenter fix
Separated tax types
Remove units from contributions
Merge branch 'master' into tax
Expense categories
Renamed Event#reason to Event#category
Year scope
Filter events by year
Standardized year scope
Converted to use new scopes
Better API
Added year summary view