Petprofile

Finished all the pet profile code. Editing, deleting, and creating functionality is implemented. I also factored the pre-existing front end templates to make them cleaner. Added pillow to requirements.txt. I also factored the email stuff in settings.py into environment variables INSTAPET_EMAIL_HOST, INSTAPET_EMAIL_USER, and INSTAPET_EMAIL_PASSWORD respectively.

Merge when you get the time. I advise you to clone this branch and test everything out first. Perhaps we can have an informal code review for this.