Adapt parser to accept republica formatted xml

We are currently using a cleaned up version of the republica xml because
there are some issues with the current version that are being dealt
with. Only slight changes were needed to accept the data. These mostly
revolve around missing attributes.

We are currently ignoring the speaker data.
Adapt views to accomodate an additional day, etc.

This is commit that partially takes care of adapting the views to a
3-day conference. Also, a few variables were added and names changed to
reflect the different days of the week.

TODO: This should probably be generalized more.
Handle formatted content and make links clickable
Update resource and code strings for republica
Remove dead code in ScheduleParser
Add speaker strings to parser

This is done in preperation for later changes that will parse the
speakers tag.
Update tracklist_spinner string array for republica