Changes

Removed COPYRIGHT.txt file, which
is redundant due to COPYRIGHT notice in LICENSE.txt.
It's product usage terms are no more applicable,
since our repository is not used by Sun Microsystems to deliver a product.

LICENSE.txt changes:
    - Updated SGI FreeB license reference from 1.1 to 2.0

    - Dropped Sun alternative license, which is redundant
      due to the FreeB 2.0 license.

    - Added JogAmp Community and common denominator:
            New BSD 3-clause license

README:
    - Added contacts
    - Sun -> JogAmp
    - Added Michael Bien

Changed 'Sven Gothel' and 'Michael Bien' New BSD 3-clause license
to 'JogAmp Community' Simplified BSD 2-clause license.