Add IO times for list schedulers

Added:

• IO times for list schedulers.
• Tests for 100 percent test coverage of schedulers.
• A new example showing custom IO times.

Note that !470 (closed) and !469 (merged) must be merged first since I branched from there.

After that, I can do a rebase if desired.

added Scheduling label

assigned to @simbj106

changed the description

requested review from @oscgu95

mentioned in issue #292 (closed)

added 12 commits

• ff218ffa - 1 commit from branch master
• ec4dcebc - 1 earlier commit
• c2bcbb69 - ldlt inverse now verified for matrices up to and including size 3x3
• 50b9fbed - added more tests and one commented out test for complex matrices
• c1ccab05 - changed test that took too long
• dc3e96e6 - fix from last commit
• 101c679c - fixes from mr comments and added tests for 100 percent test coverage in core_operations
• 8c3e8066 - Changed sfg generator to use DontCare.
• 9688697c - added SlackTime MaxFanOut and a Hybrid Scheduler, also started on example with ldlt matrix inverse.
• 1b61fd85 - rendering of dont cares now working and example is completed.
• 3c76fdbe - updated so that execution time does not have to be set for dont cares
• 4c638c13 - added io times for list schedulers and added tests for 100 percent test...

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added 3 commits

• 4c638c13...82b6e78a - 2 commits from branch master
• c001533e - added io times for list schedulers and added tests for 100 percent test...

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approved this merge request

enabled an automatic merge when all merge checks for c001533e pass

merged