Updated the README to reflect the now required Imagick extension and removed references to the Imagine-library.
Updated the README to reflect the now required Imagick extension and removed references to the Imagine-library.

kbrabrand/imbo,rexxars/imbo,christeredvartsen/imbo,kbrabrand/imbo,christeredvartsen/imbo,matslindh/imbo,rexxars/imbo,imbo/imbo,matslindh/imbo,TV2/imbo,imbo/imbo,androa/imbo,TV2/imbo,christeredvartsen/imbo,androa/imbo