[Review] SE-0093: Adding a public base property to slices

Proposal Link: swift-evolution/0093-slice-base.md at master · apple/swift-evolution · GitHub

The review of "SE-0093: Adding a public base property to slices" ran from May 19…23, 2016. The
proposal has been *accepted* without changes:

- There was little feedback from the community other than to get
  clarification.
- The core team recognizes the proposal as exposing an important basis
  operation of slice types.
  
Thank you to Max Moiseev for proposing it!

-Dave Abrahams
Review Manager