added command line utility for changing passwords.
Display more data on integral representations of Galois groups.
Add warning to the user about duplicate Artin representations.
Improve import script for families of hypergeometric motives.
When downloading number fields, put the date in the file in a comment, and add magma as a download type.
Merge pull request #196 from jwj61/master

Misc. small changes to number fields, Artin reps, hypergeometric motives, and Galois groups -- see commit messages.
Adding import script for half-integer weight modular forms.
Merge pull request #197 from jwj61/master

Adding import script for half-integer weight modular forms.
Use new database field when searching for Artin representations.
This makes it so we see only one defining polynomial per representation.
Merge pull request #198 from jwj61/master

Use new database field when searching for Artin representations.