Added an example at the end and corrected bug re EMF of N=1.
Merge branch 'minealberto' of http://github.com/ber2/lmfdb into mine

* 'minealberto' of http://github.com/ber2/lmfdb:
  Added an example at the end and corrected bug re EMF of N=1.
Minor typos and fixes in comments