Merge branch 'wip-ceriou-core-1299-change-working-directory' into 'master'

.../motor-imagery/motor-imagery-bci-2-classifier-trainer.xml

.../motor-imagery/motor-imagery-bci-3-online-incremental.xml

...bci-examples/motor-imagery/motor-imagery-bci-4-replay.xml

...eurofeedback/bci-examples/neurofeedback/neurofeedback.xml

...xamples/p300-magic-card/p300-magic-card-1-acquisition.xml

...es/p300-magic-card/p300-magic-card-2-train-classifier.xml

...bci-examples/p300-magic-card/p300-magic-card-3-online.xml

...svep-demo/bci-examples/ssvep/ssvep-bci-3-CSP-training.xml

...mo/bci-examples/ssvep/ssvep-bci-4-classifier-training.xml

...s/demos/vr-demo/bci-examples/handball/handball-replay.xml

...mos/vr-demo/bci-examples/spaceship/spaceship-freetime.xml

plugins/processing/classification/test/LDA-Native-Test.xml

plugins/processing/classification/test/LDA-OneVsAll-Test.xml

...s/processing/classification/test/LDA-OneVsOne-HT-Test.xml

...processing/classification/test/LDA-OneVsOne-PKPD-Test.xml

...ocessing/classification/test/LDA-OneVsOne-Voting-Test.xml

plugins/processing/classification/test/MLP-Native-Test.xml

plugins/processing/classification/test/MLP-OneVsAll-Test.xml

...s/processing/classification/test/MLP-OneVsOne-HT-Test.xml

...processing/classification/test/MLP-OneVsOne-PKPD-Test.xml