BUGFIX: Compilation with multi-threading OFF.

ADD: New REPORT macro DEBUG_THR_REPORT.
ADD: Cell ID into filename of visualization.
ADD: i3d::Resample when saving visualization.
BUG_FIX: Visualization of sphere-locks wasn't correct.

# Conflicts:
#	src/cell.cpp
#	src/cell.h
#	src/toolbox/regionlock.cpp
#	src/toolbox/report.cpp
#	src/toolbox/report.h

Code cleanup.

turned on sphere-shaped locks,
some changes in SphereLock internals

So that every thread-aware report consists of exactly
two lines: the thread header and the message itself

ADD: It consults Cell::scmReservationLock, which is updated.

ADD: SceneLocks::lock() with explicit SphereLock (instead of a reference onto a cell)

Removed as a result of Apple_compiler warning.