DEBUG print pointer at which the found quad lies

enables comparing quad between search callback and trying to insert
particle data
build the world before p4est and asign p4est afterwards

all p4est callbacks are organized by the world
comment update
add a quad iterator to print all quads

… or do anything else with them
add a quad iterator to destroy all particles from the array

found an error leak in this version, malloc_count differs from
free_count by 2
tried to solve memory leak

could resolve 1 … still one probleme arises from nowhere…
enhance readibility

replace q by miniQuad
enhance output readability
remove some unnecessary lines
update comments to structure
resolve enclosing quad via point.piggy3
enhance code readability

tmpData is now enclQuadData
print all quadrants
FIX saving of enclosing Quadrant

this is done now, by saving its position and its tree into the piggy3
of the point
hello again p4estindent

only autoindentation is going on here