cloudstorage.compose: Allow one source file (#50)

* cloudstorage.compose: Allow one source file

Previously compose required at least two source files. However, the
API itself works with a single file. This can be verified using gsutil.

echo "hello" > example
gsutil cp example gs://test_bucket
gsutil -D compose gs://test_bucket/example gs://test_bucket/composed
gsutil cat gs://test_bucket/composed

* cloudstorage_test: Rename test to testComposeNoInputFiles
2 files changed
tree: 4e48092f3a4307b0edbd6b6a5c37af94ddaffa14
  1. java/
  2. python/
  3. .gitignore
  4. COPYING
  5. README