moved mtex function for ipf plot to MTEX folder and updated function for MTEX 4 (symmetry to crystalSymmetry)
updated MTEX functions to set orientations and get misorientation
some cleaning (removed useless guidata)
debugged plot of arrow for BX interface (+1 squashed commits)

Squashed commits:

[66c35b9] updated plot of arrow for map interface with Matlab 2014b --> plot of a line for GBs
improved code to smooth GBs segments