Merge branch 'fsl-documentation' into 'master'

documentation/docs/fullsimlight/fsl/fsl-gen.png

documentation/docs/fullsimlight/fsl/fsl-mag.png

documentation/docs/fullsimlight/fsl/fsl-main.png

documentation/docs/fullsimlight/fsl/fsl-reg.png

documentation/docs/fullsimlight/fsl/fsl-sen.png

documentation/docs/fullsimlight/fsl/fsl-user.png

documentation/docs/fullsimlight/fsl/fsl.png

documentation/docs/fullsimlight/fsl/index.md

documentation/docs/fullsimlight/plugin-support/index.md

documentation/docs/fullsimlight/plugins/index.md

documentation/docs/fullsimlight/plugins/plugin.png

documentation/mkdocs.yml