pagination for phone log reports; remove form count indicator
Merge pull request #19 from dimagi/pl

pagination for phone log reports; remove form count indicator
Convert DatespanField to DatespanFilter
GroupField to GroupFilter
Move to deprecated fields
FilterUsersField to UserTypeFilter
move to deprecated fields
Move old reports over to devicelog filters
Merge branch 'master' of github.com:dimagi/phonelog into field-to-filter

Conflicts:
	phonelog/reports.py