Html changes on artin representations
Improve formatting of polynomials in HGM
Making the table of artin reps skinnier.
Fixing up motive pages
Improve HGM search code
Add Dave Roberts to contributors, revise groups to browse by in artin reps, show conductor in factored form only in artin rep search result page
Merge branch 'master' of github.com:jwj61/lmfdb