Adds most necessary bouncy tiles
Adds middle lab tile for random use here and there
Adds first concepts of spike tiles

Is enough to work with in levels. More tiles would be ideal
Merge branch 'master' of github.com:dxiao/PPBunnies

* 'master' of github.com:dxiao/PPBunnies:
  Updated death detection for falling off bottom of screen.
  Changed default key mappings to avoid player left/right handedness issues.
  Improved falling level
  Moved shortcuts finish box so that it touches the right level wall.
  Removed extraneous (and commented out) printing to standard output.
  Player death checks that the player hasn't gone off the bottom of the screen.
  Dialed down paranoia level in collision engine. Now hitting 60fps on falling level.
  Added updates to partitions.
  Fixed bad update interval, now set to proper value.
  Decreased collision engine resolution to more reasonable levels as a temp fix.
  Collidables are now partitioned so that only nearby objects are checked for collisions.
  Fixed bug where falling tile hitboxes were incorrectly rendered
  Falling tile map added to repo
  Implemented falling ceiling tiles
  Added Renderer delegate. TODO: Kevin needs to finish renderer code in GameplayShape:151
Merge branch 'master' of github.com:dxiao/PPBunnies

* 'master' of github.com:dxiao/PPBunnies: (43 commits)
  Made bunnies fall fluidly on moving platforms.
  Made moving tile feather distance smaller to make movement fluid.
  fixed debug messages
  Bouncy 2 is done. Still needs the new assets, which will happen shortly
  bouncy fixed
  Finished Bouncy 2
  Fixed little bug with camera positioning, and added "enter key" as a way to get through get game over screen.
  Panning camera now takes into account start positions.
  slight modification to moving test levle
  Added another level. Still needs a bit of work to bring up to date, which will be done as soon as I pull
  Improvements made to platformer level
  New platforming level
  Player no longer moves slower on keypress in direction of slingshot.
  Made landing position on ground consistent again.
  Player is pushed around by moving tiles, and dies when squashed.
  Fixed bug where transitions weren't always firing
  moving level fix
  Fixed intermittent failure to bounce off of top of bouncy tile.
  fixed player dying on collision with moving platform
  Moving map fixed
  ...
Merge branch 'master' of github.com:dxiao/PPBunnies

* 'master' of github.com:dxiao/PPBunnies: (29 commits)
  Fixed cages overlapping terrain in main menu.
  Fixed issues. I was told that bunnies cannot path through a tile of width 1, but my bunnies still pass normally. There should not be any more major bugs, and I'll continue to iron out some map design problems concerning difficulty. Sorry it took so long, just had to work through my brother to get this done.
  Fixed main menu continued momentum bug
  Fixed rehandles on collision with wall on moving tile. Fixed friction bug with standing on moving tile. Jumping from a moving tile will follow tile's motion.
  Made bouncy 1 easier. May go through to make it decent with scrolling, but so far this has proven difficult
  fixed bug in moving map
  Bunnies now move together with moving platforms. Movement key release does not cancel slingshot motion any more. Bunny running rendering bug fixed.
  Adjusted slingshot intro to make it easier until the screen fix comes in
  Fixed text on enemies tutorial, adjusted difficulty, etc
  new "difficulty graded" main menu
  Reordered levels for new main menu
  Player should not be able to "win" the main menu
  Removed blue bounding box that appeared around falling spikes.
  Fixed intangible tiles past tile location 128. Fixed invisible vertically moving tiles. Fixed rectangle union code for map loads.
  Fixed moving and falling tile loading code.
  Made cages in main menu render with back faces on the back
  Removed hitboxes from Falling tiles
  Quit cage now actually quits from the game
  Started developing the new main menu (not ready yet) Modified the tutorial2 to display more types of tiles
  Minor bugfix related to player landing positions.
  ...
Removes .DS_Store
Merge branch 'master' of github.com:dxiao/PPBunnies

* 'master' of github.com:dxiao/PPBunnies:
  fixed nested pausing
  readd yippee
  Fixed out of order levels in main menu.
  Fixed reverse cage rendering (again).
  Merge branch 'master', remote-tracking branch 'origin'
  fixed sound file names
  play new sounds and refactor GameSounds slightly
  assets for hands
  ADDED hands to grab
  Added color option to help text.
  Fixed design bugs in platformer which allowed players to get "stuck" in an unwinnable state
  made platformer a little easier with more friendly checkpoints
  moved cage rendering on pause screen
  added fading transitions to pause screen
  Added pause functionality.
  Here are the sounds for Friday.