Allow to allocate more than five process components

[Juergen Reuter]

Taken over from issue #36 from gitlab.

The problem arises if you want to combine cases which require an extra process component: Resonances (soft mismatch), real partition (powheg damping) or Hadron Collisions (DGLAP subtraction). Every combination of these will make the program terminate.

• The first (trivial) obstacle is that all try to occupy the 5th component
• One should just allocate as many components as required. mismatch, pdf and damping each increase the number of required components by one
• There has to be some managing object that gives the component index at runtime as it can't be fixed anymore

Note that Issue #32 (closed) would probably also be solved with such a solution.

[Juergen Reuter]

This is now absolutely necessary in order to do either LHC processes with DGLAP component and real finite components or LHC processes with resonances.

[Juergen Reuter]

Done in r8072. There is now a functional test which allocates seven different components. It still needs to be checked that if there are more than 5 components these are accessed correctly. Closing this one.