[racket] Racket v5.1.2

Congratulations to PLT on another great Racket release.

I'm kinda curious why this was 5.1.2 rather than 5.2.  Perhaps someone 
could explain the version number conventions when they get a chance?  I 
don't know enough about the current release process, but were I to 
guess... Making each periodic release a two-part version number would 
save the third part of the version number for urgent bugfix releases 
that cannot wait for a periodic release.  No need for a value judgment 
on whether a given periodic release rates a two-digit or a three-digit 
version number; the only question is whether you want to bump the first 
part of the version number for some reason (e.g., to reflect huge 
changes, or for marketing).  Two seems more agile than three, when, say, 
I have a dependency on "racket/places", and want to specify the minimum 
Racket version I require (i.e., "5.2" rather than "5.1.2").  Just a 
question or suggestion.

-- 
http://www.neilvandyke.org/