Shaders are the core of the rendering process. OpenGL core profile requires us to provide our own shaders, no more fixed function.
Using shaders means more flexibility, but it also implies more work. This is where this lib steps in.
VSShaderLib was designed to make our life easier. It allows to create programs, load shaders from files, associate vertex attribute names with locations, and work with uniforms, including uniforms in named blocks. It also provides access to the info logs.