Adding of "Heat of fusion" to CompoundCreator

*Updating Joback.txt file and filling missing parameters.
*Calculating of "Heat of fusion" (= melting enthalpy) as new Joback
procedure
Merge pull request #10 from Greg66/master

Updating of Joback parameter table
Added skeleton for Solids Separator and Filter Unit Operations. Models yet to be updated.
Updated 'About Box' information.