Conference ID Standardization

[jayfo]

Propose a standard for naming conference id.

I think it's probably: id_conference_{}

Where that field is probably shortname, with spaces removed, converted to lowercase.

It will sometimes be: id_conference_{}_{}

With some "track" appended (e.g., see aaai2008_nectar versus aaai2008_seniorpapers).

Write a test that checks this format.

Get existing data consistent with the format.

[jayfo]

Now addressed in my branch to be merged.