doc: clearly mention that CMake module file should be kept up-to-date.
ColladaImporter: using MeshTools::combineIndexArrays().

The function originated here and was just moved to core library to make
it useful on more places.
package: added debian package.

Again thanks to Costas Hatzis for the help.
ColladaImporter: test behavior for object with != 1 materials.

Both fail. I thought that at least the first one would pass somehow.
ColladaImporter: proper behavior for objects with != 1 materials.
Merge remote-tracking branch 'upstream/master'