Miniproject manager -- upgrade compatibility fix

Manages Matlab projects -- fixes path incompatibility across different versions

Miniproject.m by Joe Conti is a very useful project manager that allows saving of workspace variables and figures together. It also saves the path, as explicit directories, in the original version. This leads to a problem if miniprojects are loaded in a different version of Matlab (e.g. after an upgrade), as matlabroot is generally different. The path does not exist anymore or points to duplicate functions.
In this contribution, this problem is fixed by labeling the matlabroot directories instead of saving them explicitly. Upon reloading, the path directories are parsed one by, replacing the label by the current matlabroot.
There is no change in operation with respect to the old version.