Changing Readme
Minor refactoring of Campaign input filter
Adding greater than validation to Campaign::id
Adding unit test for Campaign::id
Changing provider name for unit test
Adding unit tests for Campaign::name input filter
Make unit test for Campaign input filter use entity constants
Adding unit test for Campaign::senderAddress input filter use entity constants
Refactoring unit test for Campaign input filter
Refactoring unit test for Campaign input filter
Enhancing Campaign input filter and unit test