added motivation in view and tests
auto_now_add=True and read only for time_created in MotivationText
Refactor test. Fix code style.
Merge pull request #48 from sigurdsa/read-only-time-created

auto_now_add=True and read only for time_created in MotivationText
Refactor test
Merge pull request #47 from sigurdsa/motivationPatch

added motivation in view and tests