Merge pull request #8897 from electron/versioning-doc
authorKevin Sawicki <kevin@github.com>
Mon, 27 Mar 2017 16:54:11 +0000 (09:54 -0700)
committerGitHub <noreply@github.com>
Mon, 27 Mar 2017 16:54:11 +0000 (09:54 -0700)
update versioning doc


Trivial merge