[skip ci] Updated licenses and gitignores

options/license/GCR-docs

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+This work may be reproduced and distributed in whole or in part, in
+any medium, physical or electronic, so as long as this copyright
+notice remains intact and unchanged on all copies.  Commercial
+redistribution is permitted and encouraged, but you may not
+redistribute, in whole or in part, under terms more restrictive than
+those under which you received it. If you redistribute a modified or
+translated version of this work, you must also make the source code to
+the modified or translated version available in electronic form
+without charge.  However, mere aggregation as part of a larger work
+shall not count as a modification for this purpose.
+
+All code examples in this work are placed into the public domain,
+and may be used, modified and redistributed without restriction.
+
+BECAUSE THIS WORK IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE WORK, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE WORK "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  SHOULD THE WORK PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY REPAIR OR CORRECTION.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE WORK AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+WORK, EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.