Alex Crichton 06913a5b1d Automaticaly calculate beta prerelease numbers
This is a forward-port of:

* 9426dda83d7a928d6ced377345e14b84b0f11c21
* cbfb9858951da7aee22d82178405306fca9decb1

from the beta branch which is used to automatically calculate the beta number
based on the number of merges to the beta branch so far.
2018-01-19 08:57:01 -08:00
..