Bump to 0.4.4; for 49ea396

Prepare for new patch release

Forgot to correct the `TransitionStyle/TransitionPlainStyle` `key` type
from `any` to `string`.

Fix bower error.

Bump version; fix integration test

v0.3.1

See HISTORY for more info.

v0.2.7

Remove documentation about supporting `endValue` as just a scalar
number. We might not want that soon. Plus, the equivalent isn't
implemented in TransitionSpring yet.

Generate native build require correctly

Forgot to compile the native.js file. This new structure makes it
possible.

ver 0.2.3

This deserves to be more than just a patch version bump because of the
nce improvements, but nothing breaks, so... =)