point to Contributing-to-Meteor wiki page
Fix SeededRandom's use of Random's alea.

Thanks glasser
Comments and safety belts from glasser's review.
Change AutoUpdate symbol name to be one word not two.

perl -pi -e 's/AutoUpdate/Autoupdate/g' **/*.{js,md}
perl -pi -e 's/autoUpdate/autoupdate/g' **/*.{js,md}
Merge branch 'autoupdate-review-from-glasser' into devel
Oops, missed one. Add deps package to autoupdate dependencies.
Merge remote-tracking branch 'upstream/devel' into session-hooks