Merge pull request #2 from nullet/testing-comments-appts

testing complete for comments and appts
added and required shoulda/matchers gem for testing models
Merge branch 'master' into user_appointment_spec
Merge pull request #3 from nullet/user_appointment_spec

added gem for shoulda matchers
model testing done
Merge branch 'master' into user_appointment_spec
Merge pull request #4 from nullet/user_appointment_spec

User appointment spec
associations fixed
fixes merge conflicts