Resolve "better solution to create/update src/OPALrevision.h"

Closes #346

See merge request !381

File header for strongly modified classes

See merge request !380

Resolve "Replacing variables containing strings"

Closes #552

See merge request !378

Resolve "Replace hardcoded data directory with OpalData function"

Closes #550

See merge request !377

Resolve "Geometry: Switch from hardcoded globalInsideP0_m to auto-detect"

Closes #502

See merge request !338

Merge remote branch 'origin/master' into 502-geometry-switch-from-hardcoded-globalinsidep0_m-to-auto-detect

Resolve "Output format of electric field with DBG_SCALARFIELD=TRUE"

Closes #549

See merge request !376