Add chapter time zone so project filtering can be done based on local time instead of UTC. Closes #92
Refactor extract_timeframe to no longer convert a date string to a date to a string to a time; just work with strings as long as possible
Merge branch 'timezones'

* timezones:
  Refactor extract_timeframe to no longer convert a date string to a date to a string to a time; just work with strings as long as possible
  Add chapter time zone so project filtering can be done based on local time instead of UTC. Closes #92