Flite.Flic now exports 'desugarProj'

This function is used to 'clean' a parsed program into a suitable form for
projections analysis.
Flite.Projections.Conversion only exports convertProg

Much of the conversion and type-manipulation work is completed. The (hopefully)
final piece is to convert the function types to a suitable form. I am not sure
if this necessary at the initial conversion stage, but it is looking like it is.