Move V3D operators to be inline

Project Recovery: Handle multiple instances of mantid properly

Force progress messages to be str

Add new algorithm MatchSpectra

Mantidplot/ Testing/ buildconfig/ misc. typos

The problem was that empty progress messages were being converted to
`None` which `AlgorithmObserver` did not have the proper overloaded
methods to convert to an empty string. The fix is to convert them to a
string before calling the binding. For extra measure, the progress
percentage is converted to a float as well.

Refs #23632

Refs #21800

Pete Peterson authored 6 years ago and WHITFIELDRE email committed 6 years ago

* Ignore syntax errors on startup

There was an uncaught exception in parsing the file on startup.

Refs #23555

* Invert the test that the code is executed

Refs #23555

Remove HFIR Powder Diffraction Reduction Interface

D2B normalisation fix

Found via `codespell -q 3 -I ../mantid-word-whitelist.txt` where whitelist consists of  
```
alloced
allws
amin
ang
ans
arithmetics
dum
focussed
dur
iff
isnt
ith
lod
minimise
mut
mye
nd
originaly
realy
sav
splitted
te
tim
uint
vertexes
```

Move the implementation of V3D operators to the header. This results in
a significant speed up in V3D operators.

Fix errors and warnings from llvm 7.0

Update DirectILL documentation

Add adjustments to reconstructed data in Maxent

scripts: typo fixes

Fix sip generation rules for MantidPlot

The warning appears from auto-generated code that we cannot control

They were broken in deb07b56
when fixing another issue with the rules. This simplifies
the rules so that the compilation is directly performed
on the auto-generated sip file with any warnings being ignored
in the sip definition

output intensities should not change in StatisticsOfPeaksWorkspaces

Create a separate Python/C helper library to remove code duplication