added a feedback form 

new feedback form. 
1. added a class view named "ContactUsView" on ~\OpenCommunity\src\communities\views.py.
2. added a model named ContactUs on ~\OpenCommunity\src\communities\models.py.
3. added a moedlForm named ContactUsForm on ~\OpenCommunity\src\communities\forms.py
4. added a new template named  contact_us .html on ~\OpenCommunity\src\communities\templates\communities\contact_us.html.
5. added a new url_patern to urls.py on ~\OpenCommunity\src\communities\urls.py.
6. added the template from (5) to upcomming.html  on ~\OpenCommunity\src\communities\templates\communities\upcoming.html.

ignore all the rest