required 'tempfile'
required 'tempfile'

Otherwise I get:
```
gems/google-api-client-0.9/lib/google/apis/core/upload.rb:104:in `streamable?': uninitialized constant Google::Apis::Core::BaseUploadCommand::Tempfile (NameError)
```
when do
```
service.insert_file(metadata, upload_source: "temp.pdf")
```
austin-wang/google-api-ruby-client,googleapis/google-api-ruby-client,saicheems/google-api-ruby-client,googleapis/google-api-ruby-client,austin-wang/google-api-ruby-client,saicheems/google-api-ruby-client,sqrrrl/google-api-ruby-client,sqrrrl/google-api-ruby-client