Vulkan examples do not include source code for shader code, only compiled shaders.

The bit encoded shader files (*.spv) files are included in the Vulkan examples, but not the shader source code.   The OpenGL shader source code from other examples does not compile for Vulkan.  For example, the hellovulcantexture example only has the texture_frag.spv and texture_vert.spv files included. 

Please include the human readable shader source code. in the Vulkan examples.