v0.28.0

• [breaking] Rename --output-directory to --dangerous-emptied-output-directory flag (docs)
  • This was done to more clearly indicate that output directory is cleared before use
• Add --output-files flag to write out output files into existing directory (docs)
• Add when= keyword argument to overlay/match to conditionally match
• Add ability to specify data values for libraries (docs)
• Error if extra args are given to a ytt command

be16d964964d17b463984d72ed2ec62b691b675441b38ab3ed6ea97f3fc73645  ./ytt-darwin-amd64
52c36853999a378f21f9cf93a443e4d0e405965c3b7d2b8e499ed5fd8d6873ab  ./ytt-linux-amd64
5754d48571de4464fc61ad764e3023e0896f6a2db5567abfb8d89ddfc417dd62  ./ytt-windows-amd64.exe

(Installation instructions: https://k14s.io/#install-from-github-release)