Feature/lsb frontpage

Made seperate theme for lesersokerbok.no, since there are some custom poste types etc. coming up that should not be in the base theme.

New theme has frontpage template similar to boksok.no. Two types of sections are ready, and that is enough to push to lsbtest for testing on librarians etc.

Also consists of some base theme clean up.
Jeg tenkte ikke, kopierte kun de tingene det stod boksok på og endret jeg boksok til main. Så isåfall er feilen vært der en stund.