Clean up models; fix non-auth models' errors

Made pluralization of table names consistent. Split most relationships so each side has a definition (makes it easier for me to see which models have what properties. Makes documentation easier as well).
Add pilot, ship_type, payout and status properties to Requests
List personally submitted requests
Constrict the division listing to less than full width
Add Request initializer, details property and fix bug in payout
Add convenience constructors for Modifiers and Actions
Normalize Action type names
Change Modifier.voided to a computed property
Add void(user) method to Modifier to make voiding easier
Apply percentage modifiers properly

Wasn't treating them as percentages, but as coefficients.
Implement request submission

It's kinda grungy, and I want to refactor the killmail validation code to make it a bit more generalized/reusable/configurable.
Report the Division when listing Requests
Add the ability for inline forms to the render_form macro
Set timestamps when creating Actions
Super basic request detail form.

Still needs ACL checking, lots of styling, and probably a refactoring for the forms, but it's there.
Prettify Action display
Prettify Action submission