Release 1.26
Bump version to 1.26 and fix following package issues.
- Update COPYING with latest GPLv2 license from
https://www.gnu.org/licenses/gpl-2.0.txt. rpmlint reports the address
is outdated in original COPYING.
- Package URL is updated since the original fedpkg project in
fedorahosted.org has been closed.
- Remove shebang from fedpkg/__main__.py as it is not executable.
Signed-off-by: Chenxiong Qi <cqi@redhat.com>