Merge malformed libspotify 12 fix for 2.4.1 release.

commit 2a90d7687ade21a954954862eef7f156d787cbff
Author: Daniel Kennett <dan@spotify.com>
Date:   Mon Jan 28 13:48:09 2013 +0100

    Update version number and change log for 2.4.1 release.

    Change-Id: I2a29d7752060e55b53b69926e98817dca6b2fb1a

commit 75bff8ebbb17f823c223bb1be75dc514dae3dddd
Author: Daniel Kennett <dan@spotify.com>
Date:   Mon Jan 28 13:44:59 2013 +0100

    Fix malformed libspotify at build time (GitHub issue #136)

    libspotify 12 is distributed in a malformed manner,
    in that its Info.plist contains an incorrect
    CFBundleExecutable value, preventing submission
    to the Mac App Store. This commit adds a build script
    to CocoaLibSpotify that corrects this at build time.

    Change-Id: Iba9eff1b7fe011d1d2d5c76efc19285d93da9178

Change-Id: I3bedd950ee57fade442c3d1515833c180cf5c142