Blender Git Loki

Camera tracking integration
===========================

Hopefully last codereview issue fix: do not set movieclip ID block in init function of nodes.

Camera tracking integration
===========================

- Set as Background button will enable displaying background images in 3d space.
- Move options in Display panel to column. Saves some space.
- Camera solving now should deal fine with non-centered principal.

Merging r41555 through r41563 from trunk into soc-2011-tomato

remove po/ since the workflow for translations uses branches which isnt that useful to have within blenders source dir.

For now treat translations as binary files - just access from 'release/datafiles/locale'

update path loactions for external po/

Code refactoring: split lamp functions from object.c into new lamp.c.

Code refactoring: split camera functions from object.c into new camera.c.

remove dirs to make them external's

Camera tracking integration
===========================

- Fix in rna description for pyramid level
- Unlock clip editor when deselecting all markers, deleting all marker
or hiding them.
- Keep disabled marker when clearing upto/after so there'll be no
estimated markers in this case which doesn't have much sense here.

Merging r41536 through r41554 from trunk into soc-2011-tomato

Cycles: make cycles work with new camera sensor size.

use (const char*) rather than (char*) where possible.
also removed some unused function definitons.

Fix #29162: grease pencil did not decrement user count on adding new datablock
to replace an existing one.

VIEW3D_PT_tools_meshedit_options panel:
* Removed ob check and add a proper poll function.

Disable x-mirror option when proportional edit is enabled.

This option isn't supported because it behaves strangely in 50% of cases and
hopefully disabled x-mirror will stop users be confused by this.

py operators - don't use the screen as an operators ID anymore, screen's don't store operator instances and operator functions have access to the context if they need the current screen.

also add some more py api file descriptions.

documentation - brief descriptions for bpy api files.

Merge with trunk r41545

Dynamic Paint:
* Fixed another issue from latest alpha blending changes. Zero alpha brush was painting black color.
* Fix: "Inner Proximity" brush setting was also affecting displace.
* Other small code changes.

macro formatting & remve some unused code.