use dummy texture even if in release mode
add macro CC_MODEL_VIEWER
Merge pull request #162 from tangziwen/v3

use dummy texture even if in release mode
Merge branch 'v3' of https://github.com/super626/cocos2d-x into v3
move aabb calculation to bundle
fix bug: read animation number by different version.
Merge pull request #163 from lvlonggame/v3

fix bug: read animation number by different version.
fix bug: if the material's content  that version 0.1 is empty.
Merge pull request #168 from lvlonggame/v3

fix bug: if the material's content  that version 0.1 is empty.
avoid the case that "hasAmbient" use before assign
Merge pull request #170 from tangziwen/v3

avoid the case that "hasAmbient" use before assign
Merge branch 'v3' of https://github.com/super626/cocos2d-x into v3

Conflicts:
	cocos/3d/CCBundle3D.cpp

add calculateAABB in MeshVertexData