v0.14.4

• fmt and alpha lint commands now accept exclusion patterns using which vendored files, intentionally bad test
  data etc. can be filtered out. Pattern matching of exlcudes is done using the doublestar library.
• qbec.yaml can now contain examples of data source outputs. These are returned by the mock linter implementation
  when data source imports are found. This allows you to correctly lint files that use data source imports.