Added data scripts, documentation, and cleanup.

We added another directory containing scripts to run to set up
the database. One creates or resets the database to default
tables, and the other three add a row to a specific table in
the database.
There's now a documentation section! We added content to the
README file, explaining how things work and what's available
in the database.
We also cleaned up some content within the application to help
with readability.

* Added database scripts
* Added documentation
* Cleaned up code
Updated README file.

Worked on some minor errors in the README file, causing certain
texts to be displayed the wrong way.

* Did some cleanup on README file
Addressed code reviews.

Cleaned up some code to prepare for a merge.

* Code clean up
Fixed some minor issues/typos.

There were a couple issues with followers that needed to be
addressed before merging. A join / leave sound would be heard by
followers at inappropriate times because of how they enter and
leave the conference (via leader presence). There was also a typo
in the defaultdatabase script that would cause followers to not
hear the 'waiting for leader' prompt (oops).

* Fixed join/leave sounds for followers
* Fixed a typo in database scripts
Merge pull request #14 from bkford/groups

Added data scripts, documentation, and cleanup.