removed the welcome message before survey scheduled
small dependency injection + tests for _get_survey_start_time
added comment in Visit.welcome_sent to show it is not used in the normal fashion (welcome messages are no longer sent)
changed default delay for survey to 0 minutes
s/cos/because/g
fixed test
Merge pull request #208 from myvoice-nigeria/welcome

Removed welcome message + some more tests
removed potential bug by changing error_list from attribute of VisitForm to local variable
Merge branch 'master' into develop
removed redundant constructor from VisitForm
completion of fix
changed form from class-variable on VisitView
added logging and handled case of Visit.sender being invalid
clear error state if good Visit entry is sent
Merge pull request #212 from myvoice-nigeria/fix

Fixed subtle bug caused by state being shared across different requests
Merge branch 'develop' of github.com:myvoice-nigeria/myvoice into develop
Merge branch 'master' of github.com:myvoice-nigeria/myvoice
Merge branch 'develop'
Merge branch 'master' into develop
added logging to clinic.views.py