Update resume to reflect new status.

[itsjohncs]

It it currently out of date. I should update it with slightly future facts. Namely:

• I've dropped out of school.
• I'm a full-timer at Khan Academy.
• I already interned at Mozilla (worked on DNS and mesh networking in Firefox OS).
• Galah Group has been dissolved (move into side-projects).

It can use some enhancements per #2, but that can be done at another time.

[itsjohncs]

Did a bit of this in 66b0b0b. Needs more work, but I'm blocked until I'm finished with Mozilla I think. I also need to move things over to johncs.com. Hopefully I'll have the motivation to do this though.