bootstrap: Parse Copyright.txt instead of duplicating notice

Use 'grep' to extract the copyright notice from Copyright.txt instead of
duplicating it in the bootstrap script.
cmake-gui: Parse Copyright.txt instead of duplicating notice

Set the cmake-gui MACOSX_BUNDLE_COPYRIGHT property by parsing the
copyright notice line out of Copyright.txt instead of duplicating it.
Copyright.txt: Update year range to end in 2013
Copyright.txt: Add test to check year range

Add a CMake.Copyright test that, when the CMake version number knows the
year (as it does in development versions), checks that Copyright.txt has
been updated with the current version year.
Merge topic 'cmake-copyright-year' into next

2bbf6bd Copyright.txt: Add test to check year range
3ee67d0 Copyright.txt: Update year range to end in 2013
621ba1f cmake-gui: Parse Copyright.txt instead of duplicating notice
993b685 bootstrap: Parse Copyright.txt instead of duplicating notice