expense controller and tests
#create test
fix typo
settlement controller and tests
add new files
add temporary views
add gem, some math
add presence validation for all the attributes of a settlement
Merge branch 'master' into expense-settlement-controller to work with the latest changes.
update factories
add validations for all the required attributes
add expense to the settlements params
add debugger gem
remove new route for settlement
remove unnecesary tests
extract settlement creation to the expenses controller
allow settlement creation with out a date_paid
add test views to perform smoke tests
drop settlements table
remove settlements model