renamed functions with more relevant names in preCPFE package (+1 squashed commits)

Squashed commits:

[b84aa62] renamed functions with more relevant names in preCPFE package
moved "set_inputs_boxes" function in "util_gui" folder
added functions to preset mesh parameters for BX and SX preCPFE GUIs
added function to calculate mesh refinement level from +/- buttons and defined button to reset mesh
updated documentation
updated documentation
debugged plot of the indenter
updated yaml config file to preset BX mesh and updated names of variables for python proc. file
updated arrow function in third party code for Matlab2014b. (+1 squashed commits)

Squashed commits:

[63addca] updated arrow function in third party code for Matlab2014b.
cleaned (removed useless code) and debugged code (missing brackets)
updated GBinc toolbox (edge detection method)
updated documentation
updated documentation
updated documentation
updated documentation
updated doc link in yaml_config_file and removed unused function
removed useless code in the function used to set title of folder created for CPFE proc. file
debugged set of mesh parameters (editable txt boxes for number of elements)
debugged function used to plot EBSD map
updated arrow function for Matlab 2014b (third party code)