add build status, coverage to readthedocs main page too
add build status, coverage to readthedocs main page too

ghtdak/txtorcon,isislovecruft/txtorcon,sammyshj/txtorcon,meejah/txtorcon,david415/txtorcon,isislovecruft/txtorcon,meejah/txtorcon,sammyshj/txtorcon,ghtdak/txtorcon,david415/txtorcon