slice responsibility off of interface and delegate to instance method
fix logic errors
scopes are great, so lets use them
apparently we need to use this index
specs are important
ensure that it compacts code and codes properly
this is what happens when we give it an account
what happens when we want to sum lines within a date range
we are summing, fetching is a means to an end
hash range, not separate args
this is what happens when we provide codes
find by should remove scope on scope confusion
index use was dependent on scope based selection
index is only relevant for mysql and when we search via scope
Merge branch 'master' into refactor-doublee-entry-balance-for-less-d

Conflicts:
	lib/double_entry.rb
Fixes "everything is red"
Merge branch 'master' into refactor-doublee-entry-balance-for-less-d
too hard to reliably stub this indicates this is a bad test
move error definitions to errors.rb
ute f-8