check state duration and some fixes around previous_state, may fix #258
minor tweaks missed in last commit
move state duration calc from email.rb to processor.rb
Merge pull request #290 from ali-graham/258_email_tweaks

duration in emails, various processor & filter tweaks
refactor delays filter, remove mass client failures filter
clean up
Merge pull request #293 from jessereynolds/filter_refactor

refactor delays filter, remove mass client failures filter
fix sched maint creation from web ui, closes #296
#297 add favicon, also fix flapjack logo on home page, and width layout
Merge branch 'master' into cosmetics
#298 - cosmetic improvements to email notificaitons
Merge pull request #301 from jessereynolds/cosmetics

Cosmetics
prepare 0.7.23 release
add tzinfo-data gem
add gh-296 id to changelog
specify min version of tzinfo for tzinfo-data installation smoothness
update changelog with fix for #302
prepare 0.7.24 release
require activesupport >= 3.2.14
call last_update= from EntityCheck.update_state, fixes #303