fix deprecated import base
fix lmfdb base, but should remove this file
fix dbport import everywhere
move stupid file from main level

(by the way, why is it on master ?)
IMPORTANT: remove the doctest flag

with the flag, all .py files are run when a test is run, in particular
the database scripts, which is very bad.
Merge branch 'master' into fix-tests
change Lfunction to use Jonathan's character code

still the lcalc is called from sage, hence uses the sage character in the end
should also be changed if one wants to be able to display larger character L functions
disable HGM test since the HGM are not available
add testing instructions
new conrey scheme => kronecker has changed
fix real Dirichlet L function
emphasize the need of testing!
Merge branch 'master' into fix-tests
Merge pull request #156 from pascalmolin/fix-tests

LGTM