Resolve "compiler errors with clang9"

Closes #588

See merge request OPAL/src!416

Resolve "EBDUMP for 3DDynamic field maps not working if in subdirectory"

Closes #582

See merge request OPAL/src!411

Resolve "opal.el not working"

Closes #580

See merge request OPAL/src!410

Remove empty list and duplicated opal-font-lock-special_operators and opal-font-lock-special_constants

update opal.el for OPAL 2.4

See merge request !407

Resolve 'Place elements relative to origin and orientation of beamline'

Closes #578

See merge request OPAL/src!404

Also place the Source element relative to the beamline; Add a comment to the regexp that makes sure that the origin and orientation of the beamlines doesn't differ from the laboratory coordinate system

Merge branch '579-add-option-to-source-element-to-make-it-transparent-to-backtracking-particles' into 'master'

Resolve 'Add option to source element to make it transparent to backtracking particles'

Closes #579

See merge request !405

Resolve "LONG-TRANSV-SHORT-RANGE wake not implemented"

See merge request OPAL/src!408

Resolve "Unexpected results for BANDRF"

Closes #577

See merge request OPAL/src!403

Resolve "Code duplication in Domains"

Closes #565

See merge request OPAL/src!396

- used index scheme was C but FORTRAN must be used!

Resolve "segmentation fault in unit-test  Field.PeriodicBC"

Closes #570

See merge request !402

fix memory errors in unit tests as reported by valgrind: initialise array, check for container end, array deletion

reset output stream, fixes segfault in PeriodicBC when running multiple tests after each other (fix #570)

Resolve 'Broken tests due to #509'

Closes #573

See merge request OPAL/src!401

Resolve "SAAMG: Enable RectangularDomain"

Closes #543

See merge request !372

Resolve "Unused classes in src"

Closes #554

See merge request !390

Merge branch '509-orbitthreader-computemaximalimplicitdrift-not-yielding-correct-results' into 'master'

Resolve "OrbitThreader::computeMaximalImplicitDrift not yielding correct results"

Closes #509

See merge request !336

Resolve "Option MINBINEMITTED and MINSTEPFORREBIN not working"

Closes #571

See merge request !399

Merge branch '572-source-elements-should-delete-particles-that-are-pushed-back-into-it' into 'master'

Resolve "Source elements should delete particles that are pushed back into it"

Closes #572

See merge request !400

Merge branch '509-orbitthreader-computemaximalimplicitdrift-not-yielding-correct-results' of gitlab.psi.ch:OPAL/src into 509-orbitthreader-computemaximalimplicitdrift-not-yielding-correct-results