Refactor qsp

This PR is to add a new case file and to also improve the capabilities and user experience of the QSP functionality.

added 7 commits

• 6e22524e - 1 commit from branch SPINS:master
• cffd1657 - initial work to refactoring QSP
• 1e373bdc - further changes for refactoring QSP
• 4358e9e6 - fixed small bugs
• 00e7b84f - more bug fixes
• cbfc44d7 - moved qsp to its own casefile
• d220e07a - added support for custom values and more modularity

Compare with previous version

mentioned in commit 893398bc

merged