The 0.5.0 release. Leaked screenshots. Nu on Rust stable!!

• jonathandturner moved Nu onto stable Rust! 🎉 🎉 (huge thanks to est31 for doing a bunch of work to make this possible) (#936)
• jonathandturner also shipped the Nu 0.5.0 release (#925)
• andrasio continued to work on improving column-paths (#914)
• JesterOrNot, thegedge, andrasio, and jonathandturner fixed issues and generally tightened up the code (#924, #917, #913, #908)
• wycats leaked some screenshots of what's coming
• We've now closed the survey and are working on publishing the results. Big thanks to the 160 people who responded!