Change docs links to actual file extension (.md)

See https://gerrit-review.googlesource.com/83950 for detailed context.

Change-Id: I4dc35b6396b57f70f659d4a458011b08817d8719
1 file changed
tree: 8b0cd5d392fa0019ac276d0a77699138377b41a5
  1. .gitignore
  2. .settings/
  3. BUCK
  4. LICENSE
  5. src/