add a day to end date to make sure we're including the last day of the month
add a day to end date to make sure we're including the last day of the month

--HG--
branch : project-budgeting

caktus/django-timepiece,dannybrowne86/django-timepiece,BocuStudio/django-timepiece,caktus/django-timepiece,BocuStudio/django-timepiece,gaga3966/django-timepiece,josesanch/django-timepiece,dannybrowne86/django-timepiece,dannybrowne86/django-timepiece,arbitrahj/django-timepiece,gaga3966/django-timepiece,arbitrahj/django-timepiece,gaga3966/django-timepiece,arbitrahj/django-timepiece,josesanch/django-timepiece,caktus/django-timepiece,BocuStudio/django-timepiece,josesanch/django-timepiece