- old-style (left untouched for now):
app, lib, run, sol, tut, util
- new-style:
foamApps, foamLib, foamRun, foamSol, foamTut, foamUtils
- additional aliases:
userApps, whichFoam
NB: ideally we'd have 'foamSrc' instead of 'src'.
Do we really need 'foamsrc' and 'foamfv' anyhow?