Some allocore examples are not finding the shared assets

[mantaraya36]

The following examples have issues:

allocore/examples/graphics/font.cpp
allocore/examples/graphics/modelShader.cpp
allocore/examples/graphics/textureImage.cpp

They are looking in path "../../shared" from build/bin, and thefiles are in allocore/shared.

What's the recommended procesdure for asset location?

[DrewRWx]

Discussed in #28 .

(I need still need to re-read it.)