Slide/deck management system added to speaker profile

[ddspringle]

It has been requested that a slide deck management system be added to this application so that speakers can add previous presentation slide decks for those seeking speakers to view.

Speakers should be able to add, edit and remove slide decks, control visibility and order, should highlight the presentation topic, location(s) or event(s) the topic was presented at and when (date).

Slide management would likely be overkill for profile editing and would be best served by it's own interface in the speaker area, but basic functionality should be included in the speaker sign-up for uploading slide decks (formats supported TBD, but suggest PPT and/or PDF support at a minimum).

Slide decks should be either visible in a separate window from the speaker information page (e.g. view online) or downloadable (or both).

Links to visible slide decks should be included in the speaker information page and list the who/what/when/where data associated with them.