Make demo universal
Split the majority of FHSTwitterEngine up.
Moved auth out of main file + cleaned up some of the request token code
Move defines to separate file, move auth code back into FHSTwitterEngine.{m,h}, Clean up demo, make removeNull a category
Now compiles
Start rewriting oath signing
Cleaned up OAuth signature generation code.
Fixed streaming.
Dried up TwitPic upload
Clean up date formatter-related code and remove large screenshot file
Removed final examples of old objc syntax
Merge branch 'universal-demo' into development