Fixed bugs in docs and switched to rtd theme.

5 jobs for master in 11 minutes and 23 seconds
Status Job ID Name Coverage
  Test
passed #173993
test_min

00:02:07

passed #173994
test_mpi

00:03:47

passed #173995
test_mpi_fftw

00:04:04

passed #173996
test_mpi_fftw_hdf5

00:05:14

57.0%
 
  Release
passed #173997
release_image_master

00:06:08