Merge pull request #28 from jwj61/master

Add a friend for a Galois group and start hypergeometric motives
start-lmfdb.py with an explanation
Made a mixin for Lfunctions
Moving back parsing of lcalc parsing to main Lfunction, for some reason it is used for Maass forms
Systematization of the Ltype Lkey
Removed dependency of Lfunction_base on lcalc parsing
Moved lcalc generation outside of :function_base
Typo and documentation
Merge pull request #29 from pdehaye/master

Lfunction progressively taking only core L function properties
Merge branch 'master' of https://github.com/LMFDB/lmfdb