Merge branch 'release/v2.8.0' into develop
update PO/MO
add info about management.py
fix indent
comment
remove SMSDEBUG
Celery fix for CentOS
import init migration for dialer_settings
add migration for new field max_number_contact
Update TODO
fix lineChart on dashboard
remove unwanted files
update user_dialer_settings.html
update check_dialer_setting + dialer_setting_limit function
update notification update
update requirements.txt
update dialer_contact tasks
update dialer_contact tasks
fix for travis
update dashboard with linePlusBarWithFocusChart graph