Auto merge of #3123 - rust-lang:team-meeting, r=jtgeibel
Auto merge of #3123 - rust-lang:team-meeting, r=jtgeibel

CONTRIBUTING: Add "team meeting" section

as discussed during the last team meeting

r? `@jtgeibel`

rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io