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 

Refs #9059

Replace <istream> with <iosfwd>
Remove unneeded <fstream>

Refs #9049

Moved a few inlined functions over to the .cpp file which let me replace
two more #includes with forward declarations.

Also moved 2 member variable initializations out of the constructor's
body and into the constructor initialization list.

Refs #9049

Make sure the resources allocated by the Poco XML parsing are released.
This is achieved by making sure release() is called on the object returned
by getElementsByTagName(). Poco::AutoPtr does this on its destruction.

Refs #7994

I think the previous hack almost worked - looks like it fixed the
problem for one cpp file anyway.  Moving my hack over to the header file
that both RemoteJobManager and FacilityInfo include...

Refs #7769

Refs #7769

Refs #7769

It looks like the Poco headers are trying to include both winsock.h and
winsock2.h (possibly because windows.h includes winsock.h by default).
Even if this works (and I won't know until I push it into the develop
branch), it's still a lousy solution.

Refs #7769

Couple of minor changes to make POST requests work properly:
1) Need a blank line before the start of the data in multi-part mime
data
2) Separate file data from other data (by using a second PostDataMap
reference) because it needs to be handled a little differently in the
mime encoding

Refs #7769

Updated StartRemoteTransaction and StopRemoteTransaction to use the new
web API.  Also updated the cookie handling code in RemoteJobManager

Refs #7769

First changes to support the new web api:
- RemoteJobManager hierachy has been collapsed into a single (and much
  simpler) class that now lives in MantidKernel
- RemoteJobManagerFactory is gone (no longer needed)
- Added a new 'Authenticate' algorithm
- Disabled the other remote algorithms because they haven't been updated
  yet.

Refs #7769