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

Update to clang-format-5 and reformat the codebase 

Poco::NodeList objects should always be used with Poco::AutoPtr.
Refs #11512

in BoxController.cpp == operator. Comments are necessary to highlight the assumptions, made when defining the operator.

Hate to use features I do not understand to the code I have not written but it seems does not do any harm

to the MDBoxFlatTree methors (boxID !=boxNum?

(though in very ugly way)

(should be unit tests for that particular case)

It is pain to have BC shared pointer in Nexus loader. It is also question if it needs access to box controller at all. This is why it is currently accessed through const pointer

It may be not very efficient file mode as one needs to identify the if the buffer for SaveMD make file based is defined correctly.

only MDBoxFlatTree may still need to be modified for this ticket.

Temporary Reverted box controller to with control of boxes to change to vanilla box controller and disabling BC copy constructor, as it is too complex for file based workspaces.

and enabled number of other small things related to file-based boxes

Thisgs to note:
 * C2450 warnings have been suppressed when including Poco headers
   that inherit from std::stream
 * Boost date_time no longer accepts just a date for an ISO date/time
   string

(and leaving most commits for this ticket on private branch except the special one)

hopefully reasonable function, which decreases critical section and allow to claim range of ID-s in one call to it.

Conflicts:

	Code/Mantid/Framework/API/inc/MantidAPI/BoxController.h
	Code/Mantid/Framework/MDEvents/src/MDGridBox.cpp