Update docs

README.md

@@ -53,6 +53,9 @@ api.login(username: 'me@example.com', password: 'secret')
 ```ruby
 doc = api.upload('/tmp/my_doc.pdf')
 # => Gini::Api::Document
+fh = File.open('/tmp/scan.pdf', 'r')
+doc = api.upload(fh)
+# => Gini::Api::Document
 doc.id
 # => "123456789-abcd-ef12-000000000000"
 doc.progress

lib/gini-api/client.rb

@@ -144,7 +144,7 @@ def request(verb, resource, options = {})
 
       # Upload a document
       #
-      # @param [String] file path of the document to upload
+      # @param [String] file path or open filehandle of the document to upload
       # @param [Float] interval Interval to poll progress
       #
       # @return [Gini::Api::Document] Return Gini::Api::Document object for uploaded document
@@ -307,7 +307,7 @@ def upload_connection
 
       # Helper to upload document
       #
-      # @param [String] file location of document to be uploaded
+      # @param [String] file location of document or open filehandle to be uploaded
       #
       # @return [Faraday::Response] Response object from upload
       #