Removed some Quadrant debugging code
Used some more of the Vec functions
Removed pretty useless comment
Some more 'elaborate' universe construction and parameters
Arguments to functions taking Vec were changed to use the reference type, this generates slightly better code
Pulled out the 'scene' to a seperate function
Significantly higher max_mass, different scene settings
Tweaked parameters, scene set their preferred ones too, which sorta sucks
Removed distance tweaks, changed parameters

* No more eta and distance_factor parameters
* Changed the scenes a bit, dt now depends on body count
Screwed up min/max mass to be the same boring 1e2 ... fixed it ... still boring though
Added makefile DEBUG=1 option and NO_THREADED_UPDATE define
Revert "Removed distance tweaks, changed parameters"

This reverts commit a656712b7339313536012095fb73887c2368e1ff.

Conflicts:
	particles.cpp
Minor change to create_galaxy
Fixed bruteforce aproach, relying some more on indexed-loops
Some nomenclature fix, computing acceleration by body not by node in leaf-case
Really removed those distance-tweak parameters
removed 'pos' parameter for update_body
create_galaxy() is smarter about it's result vector
galaxy scenes set a body_count dependent dt