Add URL to look up JSON-formatted speaker listing.

Similar to the existing schedule and sponsor JSON dumps, it is helpful to
have a way to get all the speaker information programmatically. This allows
for easier updates to e.g. the mobile app when speaker info changes.
Ticket sales close today, and are closed tomorrow (at 6am).
Merge pull request #110 from felixc/speakers-json

Add URL to look up JSON-formatted speaker listing.
Describes the pre-party in vague hand-wavy non-details. Closes #107.
Query benefits based on benefit type ID, rather than instance ID.

This fixes a bug from c6f629c whereby sponsor benefits were being
queried by instance ID, rather than the ID of the benefit type.
Merge pull request #111 from felixc/fix-sponsor-json

Query benefits based on benefit type ID, rather than instance ID.
Applying schedule updates.
Turns Sunday morning's tutorial into an open space.
Moves Chris Lambacher's lightning talk to Saturday.
Moves Greg Ward's talk into the ballroom.
Adds Daniel Moniz' lightning talk. Closes #112.
Adds Young Coders workshop description to schedule page. Closes #113.

Link:
https://2013.pycon.ca/en/schedule/#youngcoders