refs #8804 method returns the range of the X-values from ISpectrum
Merge remote-tracking branch 'origin/bugfix/8788_CRISP_IDF_parameters'
Merge remote-tracking branch 'origin/feature/8818_loadfullprof_wiki'
refs #8804 checkpoint, nothing finished yet.
Merge remote-tracking branch 'origin/feature/8737_compton_scatter_alg_docs'
Merge remote-tracking branch 'origin/feature/8727_icat_external_dl_file_creation'
Merge remote-tracking branch 'origin/feature/8757_icat_add_investigation_num_search'
Merge remote-tracking branch 'origin/feature/8733_polarisation_correction_gui'
Merge remote-tracking branch 'origin/feature/8637_stepscan_preadara_group'
Merge remote branch 'origin/feature/8226_multiperiod_live_event_data'
Merge remote-tracking branch 'origin/feature/8810_conv2MDRanges'
refs #8804 Checkpointing before pulling in master

with changes necessary for this ticket.
Merge branch 'master' into feature/8804_ConverToMDHelperV2
refs #8804 Comments for ModQ transformation

noted while testing ticket #8810
refs #8804 Added method which checks unit conversion range.
refs #8804 one more place where m_Det has not been renamed
refs #8804 Compiles and looks correct

But testing is needed.
refs #8804 Implemented Martyn's suggestions for ISpectum method

Though with reservations. Of course it looks better and more generic, but for vector I know that size is achieved in const time and accessing the elements through brackets is almost the fastest operation possible. Have no idea how back is implemented.

Other comments are work in progress -- have to discuss how actually this method is implemented for events.
refs #8804 Comments and formatting
refs #8804 fixed last minor things and enabled unit tests.