fix for error spotted by Jérôme Lelong
[#20681] Text beveling works incosistently when not justifying text left
own error from r23101
bugfix in 2.4x also [#20480] crash/lock-up for certain aspect ratios
[#20116] calculation problem in bvh_importer.py
from Martin K (martinbk)
DXF-importer script v1.12 - 2010.03.04 by migius
- fix POLYFACE for non-standard ordered double-vertices
- fix (unused)-BLOCKs-detection for non-DXFr12-conform SECTION:BLOCKS
- wip-fix global relocation: culprit is blenders 1mio-Limit
- fix normals for TRACE (in opposite to SOLID)
Epydocs: Physics Constraints module: (following recent update on trunk/2.5)
main functions are all here.
The others are either commented as unstable in the code, or not commented at all.
added API support for Background Image: Windows.GetBgImage(), Windows.SetBgImage(image)
tiny correction for PyAPI Background Image: Windows.SetBgImage(image)
function call activates background-image-mode if disabled
DXF-exporter script update: v1.36 - 2010.06.20 by migius
- added export Nurbs-Curve (3,4,5th-degree) into POLYLINE-NURBS(quad,cubic)
  but no support for Bezier-Curves, because DXF doesnt support them

DXF-export library update: v1.34 - 2010.06.20 by migius
 - bugfix POLYFACE
 - added DXF-flags for POLYLINE and VERTEX class (NURBS-export)
DXF-exporter script update: v1.37 - 2010.06.23 by migius
- APPLY-MODIFIER: added exception for modifier-free instances to export them as BLOCK/INSERTs

DXF-export library update: v1.35 - 2010.06.23 by migius
 - added (as default) writing to DXF file without RAM-buffering: faster and low-RAM-machines friendly
patch [#24917] Ipo curves of particles are not exported to python
from Daniel Fiser (danfis)
BVH Exporter, originally written by myself but exported bad rotations,
Andrea Rugliancich managed to fix these this bug so the script is finally ok usable.

Will port to 2.5x later.
pedantic pep8 correctness
x3d/vrml import fix for bad comparison with vertex color index.
leak fix in blender 2.4x, noticed while updating for 2.5x.
backport fix from r35397
fix for building with gcc4.6
fixes for DXF-importer script:
 v1.12 - 2011.05.07 by migius
 h1 fixed for SPLINE: points coordinates are always in WCS
 h1 code beautifying
 v1.12 - 2010.04.29 by migius
 g1 preparation for non-UI-mode: import_dxf.main('dxf_file_name.dxf')
fix for memory leak converting an idproperty group into a dict