Merge pull request #1819 from pace-neutrons/1818_filebacked_info

Better documentation on filebacked objects

Merge pull request #1767 from pace-neutrons/1766_bugfix_release

The information about release 4.0.1

Merge pull request #1728 from pace-neutrons/1727_runid_in_nxspe

runid in nxspe

Re #1 fixing errors caused by conflicts during cherry-picking

Re #944 fixed recalculate_runid_map in case of the same headers extra…

…cted from filenames

Re #771 disabling slow MPI combine test on Windows

Re #1 typo in horace_init header

Re #719 minor doc edits from experience of fixing the test

Re #705 Merge branch 'rel_3_5_3' into rel_3_5

# Conflicts:
#	horace_core/GUI/horace.m
#	horace_core/sqw/@sqw/private/binary_op_manager_single.m

Re #690 Performance of rel_3.5 code on ndw1676