roadmap stab

here's a brief stab at an i2p roadmap, as there have been discussions
on #iip-dev as to what needs to get done when.

resource allocation is obviously off the hip and incomplete, and I didn't
get into much detail at all past 1.0.

ganttproject.sourceforge.net++

(quick milestone summary: alpha on sept 1, beta on sept 15, 1.0 on oct
1)

some food for thought for our meeting tonight.

-jrandom