Make code file names consistent

[ghost]

Code file names in this integration need to be more consistent. Suggest the following:

• All file names (including data objects) use the "V1" prefix.
• Mock files end with "Mocks"
• Unit test files end with "Tests"
• Controller files end with "Controller"
• VisualForce pages end with "Page"
• Facade file names end with "Facade"

[ibuchanan]

Improved: Consistent V1 prefix on data objects helps Salesforce administrators manage custom code.