minor changes on some classes which showed warnings in eclipse < just
because i can
extension of my surface-dependent potential classes
NEW Secondary Structure Enums one for 8 class and one for 3 class
differentiation
function to map 8 on 3 is included in SecondaryStructureEight
NEW DSSPEntry and DSSPFileReader 
DSSP Entry just a value-object with nearly no functionality
DSSpFileREader has the same functionalities as the PDB anaologon