Add speaker submission form

[melchoyce]

Let's try to get up a speaker submission form soon. It can mimic our WordCamp speaker submission form:

• Name
• Email
• Short (3-4 sentence max) bio
• Talk title
• Talk abstract
• Experience level (beg, int, adv)
• Are you local? (y/n)

[ryelle]

Draft page with form (I made up before seeing this list): http://bostonwp.org/?page_id=124401&preview=true

The intro bit needs help.