Added inverse multivector method
gitignore .DS_Store and *.pynb
Update .gitignore
Fix norm2 error. Correct norm and norm2: self * self.rev() instead of self*self.
Added dual method
pep8 conform.
Corrections to norm2 and norm in mv.py
Corrections/Additions to multi-linear functions (tensors)
Merge branch 'master' of https://github.com/MOBle/GA
Documented changes in Mlt (partial)
Merge remote-tracking branch 'upstream/master'