refs #7228 Initial rumbling around
refs #7228 different multithreading options exploration
refs #7228 Ugly working multithreadede solution

Does not produce any significant acceleration as main performance drug is memory allocation, but otherwise working and bashing threads.
refs #7228 removing threading stuff
refs #7228 enabled "Drop 0" option in convertToMD
refs #7228 fixed error in unit tests
refs #7228 fixed strange error with kernel header
refs #7228 fixing unit tests
refs #7228 Changed default "SingleEventPerBin" to true

to sustain existing unit tests.
Re #7228. Small tidy-ups (formatting, spelling).
Merge remote branch 'origin/feature/7228_ConverToMDPerformance'