bump pushy version
fix rst formatting

Signed-off-by: Alfredo Deza <alfredo@deza.pe>
install: add dumpling, emperor to stable list

Signed-off-by: Sage Weil <sage@inktank.com>
Merge pull request #21 from alfredodeza/master

Bump `pushy` version and fix RST formatting
Reviewed-by: Gary Lowell <gary.lowell@inktank.com>