Conference-scheduler-cli

--------------------
* Minor: Fix line ending of schedule.csv

--------------------
* Breaking Change: Output markdown files are no longer produced

* New Feature: The ability to add 'unbounded' events which occur in all rooms
on all days

* Minor: Speaker names in their original form are included within the pickled
events dictionary

* Minor: The full slots list, with index number, is included in the log file

* Minor: Allocated and unbounded events now have tags added automatically
which ensure uniqueness (no longer necessary to use e.g. 'morning' tag)

* Bug Fix: Durations for unbounded and allocated events are taken from their
definition (previously hard coded as zero)

-------------------
* Minor: io functions now take the working directories as arguments

* Minor: All proposals now included in pickled resources

-------------------
* New Feature: --reload option on validate command to control whether the
conference definition is reloaded from input YAML files

* Bug Fix: --help option threw an error if run outside a valid project folder
structure

-------------------
* Minor: Subtitles from proposals are now imported

-------------------
* Bug Fix: Original schedule and new schedule were being passed to the diff
function in the wrong order