Proc namespace reorganisation

[ichthyo]

In fall 2009 we decided to steamline the handling of namespaces.

public interfaces --> namespace lumiera... (src/include/...)
Proc implementation-> namespace proc::... (src/proc/...)
GUI implementation-> namespace gui::... (src/gui/...)
internal supportlib-> namespace lib::.. (src/lib/..)

Joel has done all of the renaming for the GUI part, while Ichthyo deferred the renaming within Proc until all important branches are again close to master (to avoid lots of conflicts).

[ichthyo]

done, finally.
what a slaughter