Replaces Color and CSS Units plugins with Token plugin, which supports all CSS
properties and string formats.

Squashed commit of the following:

commit 3b78310fb7305372943426d08571c33ba56d02e3
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue May 1 23:11:10 2012 -0700

    Builds 0.6.3, cleans up a few files.

commit 6a82cfbfcfc890c00c28a00e9ff1d45665a7f25b
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue May 1 23:05:58 2012 -0700

    Fixes an issue in getFormatStringFrom.

commit 1c23eb1912fcf4fb2161e3c0e07613d8cee45306
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue May 1 22:53:57 2012 -0700

    Fixed a test.

commit 6e9f16aeb006cf666b11f02eaed3e829eab7efad
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 22:47:59 2012 -0700

    Adds a failing Token test.

commit dafda2d1dd391946accfc724dc3cbc7bdf03495e
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 22:39:08 2012 -0700

    Adds a sanity check test.

commit a6bd15b389bbadc35c19a37069451f4c09d9b054
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 21:45:42 2012 -0700

    Exposes some Token bugs in cssUnitsBasic.html.

commit 85879d2a07917447ba5efe09246276cbbaa50502
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 21:23:48 2012 -0700

    Removed a comment.

commit cd4792629c0359ddfcb917a81e7eb517c2b607eb
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 21:22:04 2012 -0700

    Fixes a RegExp to support negative token values.

commit d437c52ab2f5289955edaa4ebd2e6a0f96c7512e
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 20:56:02 2012 -0700

    DRYs up a RegExp.

commit b8e2153e38b9d491e4e503a181f1fd75258e0487
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Mon Apr 30 20:44:10 2012 -0700

    Adds a failing test.

commit 3eab78fc1617525f96bd837c36cfc2ad80a0657f
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 20:45:04 2012 -0700

    Adds another token test.

commit 442d65f1681caa80683147222eda025580fffd94
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 20:41:08 2012 -0700

    Test for multiple token eases passes.

commit 5fb095b08eaa3df5ad3fb9331355d6e1acbd196c
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 20:13:01 2012 -0700

    Fixes some tests.

commit 08c6a89e31ca1e8e45b3d1eef892a20cf96237ba
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 19:54:13 2012 -0700

    Got started on easing support, broke a lot of tests.

commit 2011f3061f0782c1e89a883fdb903abb61a3824f
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 18:55:10 2012 -0700

    Adds a failing Token test.

commit 2c9b403134c924bc0eba9e618d5d38162f5e7ba5
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 15:05:14 2012 -0700

    Added hex support to the Token plugin.

commit ad45cf201b1e55171eb4e2d267f5773fc93e8b4f
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sun Apr 29 13:09:10 2012 -0700

    Some refactoring and adds a broken test.

commit f315b0e02ca385f0cdda82da86599193af5030f9
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 20:43:56 2012 -0700

    Added more tests for Token.

commit 1acf712ae8bf6b8f0fcebb3cd2df70499df5fe19
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 20:37:00 2012 -0700

    Removed some garbage code that should not have been there.

commit 44a6a9143e716fe5269380f5b4c614914c8a0788
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 20:29:05 2012 -0700

    Fixed some test flakiness.

commit 1c4007e5f60a64760ab12d2105a4766cfb317f16
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 16:33:18 2012 -0700

    Adds RGB string sanitization.

commit dab671768317fa9eadb434604a1713c8697ca14b
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 16:10:58 2012 -0700

    Incomplete RGB sanitization.

commit 724b244cd2bb6477550cbb747a36e39daf570798
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 15:34:57 2012 -0700

    Adds basic format string collapsing.

commit a29689ed17c6fc9985d86c0252ebe248979b8ee0
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 14:43:33 2012 -0700

    Exploded the formatted values.

commit 7e30640f98bf4935960c481ee925b5dde6ce5ed0
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Sat Apr 28 14:16:39 2012 -0700

    Manifests are now stored in an Object.

commit cb36b034e8421fe6b8c64d8493ba410a11c876c2
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Apr 24 20:55:17 2012 -0700

    Adds token manifest extraction.  Not as fancy as it sounds.

commit a24b5f27813a703db893420cb3ee82cc20954a76
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Apr 24 20:39:30 2012 -0700

    Started on breaking out the token chunks.

commit 648d4277da6034993a0acac9469dfbac3b957ce8
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Apr 24 20:28:35 2012 -0700

    More stubs.

commit 1aa4ef55f2fb0fd22cfa61e5fd6058921c7db2c6
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Apr 24 19:44:37 2012 -0700

    Some stub code for the Token plugin.

commit 62a83f89fb897426ad5b4eaabf11736826e883c8
Author: Jeremy Kahn <jeremyckahn@gmail.com>
Date:   Tue Apr 24 19:31:54 2012 -0700

    Boilerplate for Token plugin, some initial failing unit tests.