Change rule of generating MD5

Change the way of generating MD5:
This will make all MD5 in your project file change! so if you collaborate with others in vcs, make sure that you all update to 4.1.0 via pip install --upgrade xUnique

Fixed bugs and new features:

• add more versbose output in -v mode
• refactored MD5 generating rule, changed path generating method: now it is surrounded with an isa type and []