Fixes inline osg image path (collada opacity & all inline generated files)
Fixes osgjs to write resized image relative to the output model
Adds escaping for string serialization
Adds resizeTextureUpToPowerOf2 option for osgjs pseudo-loader

If the value passed in 0, then no texture resize will occur at all.
Note that this changes the default behavior of the plugin as it previously
forced textures to be 2^n x 2^m with max(n,m) <= 11.
Fixes some compiler warnings

* Removes dead code
* Removes unused variables
Merge pull request #17 from mrchlblng/update_osgjs_skfb

Update osgjs skfb