This reverts commit 9153648f.

The intention of this commit was to fix potential issues when operating on a
dihedral connecting 4 atoms where at least 3 atoms are exactly on a line.
Dihedrals are ill defined in this case but "expected behaviour"
(whatever that means) is tested as a unit test.
A fail was observed in two cases. First case that triggered commit
9153648f, second case that showed that the
problem is not solved. Therefore reverting to original state in order to find
different solution.

wrong branch, big sorry

This reverts commit e77d08a6.

various related cleanups and optimizations:
 - removed superfluous sort in load_dcd
 - added explicit *TransformedPos() methods to complement *Pos() methods
   (XCSEditor, AtomHandle, AtomImpl)
 - changed getter/setter logic for AtomImpl Name, TransformedPos
   and OriginalPos to direct access, deprecated GetName and removed
   Get*Pos and Set*Pos

specifically, remove LOGN_* macros and introduce new logging levels. We now
have ERROR, WARNING, INFO, VERBOSE, DEBUG and TRACE. DEBUG and TRACE are
turned off under NDEBUG and expand to an empty macro.

new default verbosity level displays ERROR/WARNING/INFO

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@2709 5a81b35b-ba03-0410-adc8-b2c5c5119f08

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@1742 5a81b35b-ba03-0410-adc8-b2c5c5119f08