Shadowing builtin function

[arokem]

Upon running the canlab_toolbox_setup I get this warning

Warning: Function vecnorm has the same name as a MATLAB builtin. We suggest you rename the function to avoid a
potential name conflict. 
> In path (line 109)
  In addpath (line 96)
  In canlab_clone_github_repository (line 164)
  In canlab_toolbox_setup (line 179) 

Might be worth renaming it to avoid name-space collision.