[WIP] Welcome Page Configuration

Given the lack of excitement around Pull #243 for the short-lived and possible future implications it may have, I wanted to propose building some more functionality right into the welcome page itself, rather than trying to let plugins do the dirty work.

This is still a WIP, but I wanted to see if there was any feedback thus far; I want to modularize it a bit more, and add other blocks, similar to the abilities of the My Page configuration.  Recent activities in projects that the user is a member of and the like.