First steps for the modularisation of Hopest. Init_mesh stuff is now
done in hopest_mesh and hopest_solver. But BC into p4est, still buggy.
periodic boundaries vorbereitet, problemin p4est identifiziert. eine periodische BC in z funktioniert.
New p4est removes some errors, saving BCs now works.
 Periodische Raender standardmaessig ausgeschaltet, da noch nicht debugged in p4est.
Merge remote-tracking branch 'holke/develop'
BCs from p4est are now functional. Damn stars.
Merge remote-tracking branch 'holke/develop' into develop

Conflicts:
	src/cwrapper/p4est_wrapper.c
Submodules / Bootstrapper nur bei Bedarf aufrufen.
bugfix
Merge remote-tracking branch 'holke/develop' into develop
Einige neue (leider halbfertige) Features auch mit drin.

Conflicts:
	compile
	src/Makefile.am
	src/cwrapper/p4est_wrapper.c
	src/mesh/mesh.f90
	src/mesh/meshfromp4est.f90
Merge remote-tracking branch 'fhindenlang/master' into develop
Merge periodic stuff, not fully functional yet.

Conflicts:
	src/cwrapper/p4est_binding.f90
	src/cwrapper/p4est_wrapper.c
	src/mesh/mesh.f90
	src/mesh/mesh_readin.f90
	src/mesh/meshfromp4est.f90
Merge remote-tracking branch 'iaghoff/master' into develop
Merge vom Malte, nur kleinere Probleme.

Conflicts:
	src/cwrapper/p4est_wrapper.c
	src/mesh/mesh_refine.f90