Added comment in README about changed functionality in book chapter examples
Merge branch 'johanhake/fix-issue-54-working-of-numpy-vector-interface-in-parallel'
Small fix for Python 3
Some more fixes for numpy interface:
  -- fix some issues for Python3
  -- fix typemap for dolfin::la_index which need to be checked runtime for the size...
Merge branch 'master' into johanhake/fix-issue-54-working-of-numpy-vector-interface-in-parallel
Merge branch 'johanhake/fix-issue-54-working-of-numpy-vector-interface-in-parallel' into next
Merge branch 'next' of bitbucket.org:fenics-project/dolfin into next