Mnt/devel base environment

Closes #1 (closed) and #2 (closed)

• The $FSLDIR/etc/fslconf/fsl.sh script now automatically adds $FSLDIR/share/fsl/bin/ to the $PATH, for official (fslinstaller-installed) FSL installations.
• The $FSLDIR/etc/fslconf/fsl-devel.sh script now activates the $FSLDIR conda environment, for official (fslinstaller-installed) FSL installations.
• The $FSLDIR/etc/fslconf/fsl-devel.sh script now assigns default values to $FSLDEVDIR and $FSLCONFDIR, if they are not set by the user.

added 1 commit

• 5ebc3430 - RF: Use -f rather than -e for file tests, and quote file paths with vars

Compare with previous version

mentioned in commit 043fe3a2

merged