Update get()
Add manager commands for manipulating prices
Refactor Cronus
Fix args and kwargs
Edit descriptions
Remove import
Refactor popprices and move to Hermes
Rename MyClass to Historical
Refactor view
Add cost basis properties
Add default to 'on' and add reindex option
Refactor df indexing
Minor refactoring
Update travis config
Add new property placeholders
Replace sorted with sort()
Minor refactoring
Add currency_id property to native_prices
Add description
Add df_reindex()