Refs #10869

Refs #10869

Requires the test data underneath a CMakeLists file so the Test data has been moved
Refs #10869

Added clang to dev package. Refs #10948

update build script for develop_incremental-clang

Update Valgrind suppressions

Conflicts:
	Code/Mantid/Framework/DataHandling/src/LoadAscii2.cpp

Sorting out conflicts in merge with master, no issue apparently

Merge remote-tracking branch 'origin/feature/8318_qtiplot_entities_save_to_nexus_causes_exception_and_should_not_be_possible'

Drag-drop peaks only

We use the sets for each presenter to calculate the difference. If the difference between the peaks workspace is the same as the original set, then there is no overlap, and we may accept that presenter.

A number of unit tests have been introduced to verify this.

Changed the input vectors for createRunInfoWS as references according to
the comment from the tester.

Merge remote-tracking branch 'origin/feature/7562_display_empty_list_in_custom_setup_in_fit_function'

Conflicts:
	Code/Mantid/MantidQt/SliceViewer/src/SliceViewer.cpp

Sorting out more conficts, all seemed fine, re #8486

refs #10934. Fix 4d problem.

Feature/10856 drag drop