- 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.py for ExM C-Utils: An initial package dependency for Swift/T
* New package.py for ADLB/X: A 2nd package dependency for Swift/T
* New package.py for Turbine
* New package.py for STC
* New package.py for ExM C-Utils: An initial package dependency for Swift/T
* New package turbine
* Fix package.py as requested by @adamjstewart
* New package.py for ADLB/X: A 2nd package dependency for Swift/T
* Add latest version of GNU Parallel (#3106)
* Address formatting guidelines from @adamjstewart
* WIP on new Turbine package.py
* Formatting fixes
* Complete Turbine package.py
