Fixed issue #104 etc

Made sure that oldforms don't show up on the browsing page of L-functions of Maass forms on Gamma_0(N). This was achieved by:
Added the field 'Newform' : False in the database for the ones that showed up. (This should be done systematically.)

Only showing 4 for each level since the 5:th for level=6 doesn't have coefficients in the db.

Now the claim is true that it shows the first 4 Maass newforms for each of the levels.

Also pulled in some layout changes from David and Patrick.

Passed all tests.