Update documentation for new naming conventions

  modified:   doc/*
Change Legendre -> legendre

  modified:   python/cthyb_matrix.pyx
  modified:   test/cdmft_4_sites.py
  modified:   test/single_site_bethe.py
Fix a bug with global moves

  modified:   c++/move_global.hpp
Clean and add tests

  modified:   test/CMakeLists.txt
  new file:   test/global_moves.output.h5
  modified:   test/global_moves.py
  deleted:    test/time_acc.py