- improved handling of the various "preset" camera angles
(top, bottom, top left, top bottom right etc) for combined
camera:
 * now all possible combinations are generated on the fly
when initializing a CombinedCamera
 * now all method names (toTopView() etc) are only aliases
for a single , generic method
 * fixed issue with more and more distant camera when using
these presets repeatadly
 * closes #8