- remove the old LGPL license headers from all files in Spack
- add SPDX headers to all files
- core and most packages are (Apache-2.0 OR MIT)
- a very small number of remaining packages are LGPL-2.1-only
* new package:SNAP
* removed boilerplate
* Delete .nfs00000000003a8b1700001358
* install another executable in bin and install readme
* added quotes around README.md
* moved readme to prefix