1.0.0

Enhancements

• Supports installing final Swift releases such as 2.2.

Bug Fixes

• Swift toolchains 'latest' version is no longer shown in swiftenv versions
  on OS X.
• Fixes a problem where swiftenv install on Linux will incorrectly
  determine URL for the Swift binaries.
• Adds a --verbose mode to swiftenv versions to show where the version was
  installed.