Generate periodic-to-quasiperiodic unit blocks to fill space

Generate unit block to fill 2D space that presents from periodic to quasiperiodic nature.

During the substitution processes for square-tringle-tilings, part of next-iteration tiling-elements could go across the boundary of the current-iteration one and cause repeats of elements. This could influence problems on following CAD treatments, e.g. for applications of optics, electrics, and etc. In this version, the repeated elements are removed by using MatLab function unique();