Adds support for 3D rotations. v.0.2.0.

Squashed commit of the following:

commit c13aa0b554867af86bef48ad4afb8f711b71f13e
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Thu Aug 15 10:04:19 2013 -0500

    Removes some  in CrosshairView.

commit c116c845b2229b97b45cf0e93803ed17f2847a62
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Thu Aug 15 09:51:24 2013 -0500

    Shorten up redundant easing strings.

commit 313162f1de99ce09ac15c7840f5fefa8dbd5d437
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Thu Aug 15 09:44:51 2013 -0500

    Rebuilds 0.2.0.

commit dcfe2a11b0932f328a29eb8dc2984998c8bfa304
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Thu Aug 15 09:33:27 2013 -0500

    Unbinds Cubelets when CorsshairViews are torn down.

commit 43b70dc145845efd084b99bbe0ecc0b8596351cd
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 17:10:10 2013 -0500

    Builds v.0.2.0.

commit 680c5c97cdb572f22cfcb02653e3051b04bc2f27
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 17:00:29 2013 -0500

    Updates Help section to reflect Cubelet updates.

commit 41262c4a5b760ea8b40c6ad64ced5b9e1576b3c1
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 16:25:20 2013 -0500

    Fixes rotation field alignment.

commit 6182821bd67130fc5411bf2f49813b34649562e7
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 15:52:37 2013 -0500

    Syncs Cubelet and KeyframeFormView states.

commit 5f991e027ea7b86153056ec5d2f4b2bb3e259fb4
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 15:34:38 2013 -0500

    Hooks up rotation changing to the UI.

commit 0447afa595d5789bab5c9a32a8d522d2451f5681
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Wed Aug 14 10:54:28 2013 -0500

    Rotating the Cubelet rotates the crosshair.

commit 948b20aa384c58f40b6062d5d63105d76fadf6f4
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Aug 13 15:14:52 2013 -0700

    Remove old rotation code.

commit 23877164a37c9a1daa684de893d77b64dcc83b8b
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Aug 13 15:08:47 2013 -0700

    Prevents Cubelet dragging from moving the crosshairs.  Hides/shows the Cubelets.

commit 146f729e2aafc1667af122f47fb9df22b03cc0d5
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Aug 13 14:54:33 2013 -0700

    Drops some Cubelets into the app.