FIXES SDEV-393
Made Late Tool Compatible for a date range

Added a seperate view for showing late tool table which is updated by URL query parameters
FIXES SDEV-480
Added Management Command for sending emails with late report link
Merge branch 'master' of git://github.com/abztrakt/labgeeks-chronos

Conflicts:
	labgeeks_chronos/views.py
FIXED MERGE CONFLICTS
SDEV 486. Error page gives instructions to lead about what shift caused the late tool to fail.
Fixed merge conflict between SDEV-393 and SDEV-486
SDEV-485