Needed for instrument loading.
Also re-instated the findGroup() function in NexusGeometryParser as the refactored
version was disfunctional (segfaults)

Update copyright headers in all files

Squashed commit of the following:

* First version of a script to manage copyright statements

re #23468

* Neatened up script, added comments

re #23488

* move script to tools directory

re #23488

* small script changes and a couple of manual file changes

re #23488

* Minor chnage to whitespace detection in regex

re #23488

* Add an excluded directory

re #23488

* remove a repeasted copyright statement in a file

re #23488

* Don't comsume the comment end if it is on the same line

re #23488

* fix error in new copright parsing

re #23488

* remove double copyrifght entry

re #23488

* Improve handling of old copyrights at the start of comments

re #23488

* remove empty comments re #23488

* exclude gsoapgenerated directories

re #23488

* Sort out greedy line matching re #23488

* improve empty comment removal

re #23488

* improve false positives

re #23488

* impressive speedup by limiting regex matching length

re #23488

* remove evil invisible non ascii character

Also upadte the copyright at the same time

re #23488

* resolve multiple copyrights in a single file

re #23488

* resolve an issue with new statement detection

re #23488

* another unprintable unicode character

re #23488

* pep updates and cmake the new copyright fit clang format

re #23488

* update already done new format headers

re #23488

* wrong type of bracket

re #23488

* Update class_maker and friends

re #23488

* Update all copyright statements

re #23488

* clang format re #23488

* flake8 warnings re #23488

* Flake8 warnings re #23488

* Exclude .cmake.in and rb.in files

re #23488

* replace missing line re #23488

* exclude .py.in files as they are flasely recognized as C++

re #23488

* another setp.py.in re #23488

* another .py.in correction re #23488

* Hopefully the last of the .py.in files re #23488

* resolve utf-8 encoding of python files and changed ABINS checksum

re #23488

* updates to unit tests that reference line numbers

re #23488

* remaining unit test files and other fixes

re #23488

Also constains fix for monitor transformations

Potential error with ID->index mapping solved. More explicit around
exceptions too.

Also change tabbing in example
Also fix issue with Loader

Previously no bank was made.

Note that the hdf5 instruments added to mantid were created via the
python-nexus-utilities tools at tip
ba1ed8b387258f6841f1af71ee0ea9e098babedb

Also note that i had to add code to respond to runtime knowldge about
exact integer representations in the file.

From the current timings for equivalent instrument creation times
        InstrumentDefinitionParser    NexusGeometryParser
WISH    2200 ms                       500 ms
SANS2D  610 ms                        80 ms
LOKI    200 ms                        10 ms

The majority of these are available via the respective Performance Tests
for the tests suites.