Adding specs for coverage
Adding ListFiles Command to API service description
Adding ListFilesIterator
Adding examples for files.list with and without the ResourceIterator
Adding docs for files.list API method
Bumped version to 0.5.0
Adding disclaimer and acknowledgements to README
Updating description and branch aliases for composer
Merge branch 'release/v0.5.0' into develop

* release/v0.5.0:
  Updating description and branch aliases for composer
  Adding disclaimer and acknowledgements to README
  Bumped version to 0.5.0