remove licenses and use SPDX references instead

Signed-off-by: Roger Meier <roger@bufferoverflow.ch>
code location change:§ svn to git
Signed-off-by: Roger Meier <roger@bufferoverflow.ch>
Revert "remove licenses and use SPDX references instead"

This reverts commit 8aa6e05f2b5be7bb4959687be27c622b21ecb7f9.
update examples and schema with example license reference
was part of reverted commit 8aa6e05f2b5be7bb4959687be27c622b2
code location change:  svn to git
Merge pull request #17 from bufferoverflow/bufferoverflow

#16 remove licenses and use SPDX references instead