Version 2.0 - Improved stability, new tutorials, boolean exporting op…

…erations, new options in PlaceRect ('align'), PlaceArc ('equidistant') and PlaceSBend ('minimumLength'). Added a arrayedReference (PlaceARef), compact u-turn, a multi-mode interferometer, a Mach-Zehnder interferometer, and a contra-directional coupler.

Little makemex.m correction

Merge branch 'master' of github.com:nicolasayotte/MatlabGDSPhotonicsT…

…oolbox