README.md in preservation-client-6.1.0 vs README.md in preservation-client-6.2.0

@@ -29,11 +29,11 @@
 
 ```ruby
 require 'preservation/client'
 
 def do_the_thing
-  current_version_as_integer = client.current_version('druid:oo000oo0000')
+  current_version_as_integer = client.objects.current_version('druid:oo000oo0000')
 end
 
 private
 
 def client
@@ -49,11 +49,11 @@
 def initialize
   Preservation::Client.configure(url: Settings.preservation_catalog.url, token: Settings.preservation_catalog.token)
 end
 
 def do_the_thing
-  current_version_as_integer = Preservation::Client.current_version('druid:oo000oo0000')
+  current_version_as_integer = Preservation::Client.objects.current_version('druid:oo000oo0000')
 end
 ```
 
 Note that the client may **not** be used without first having been configured, and both the `url` and `token` keywords are **required**.
 
@@ -72,9 +72,10 @@
 
 ### Retrieve file signature (checksum) information
 
 - `client.objects.checksums(druids: druids)` - returns info as raw csv
 - `client.objects.checksums(druids: druids, format: 'json')` - returns info as json
+- `client.objects.checksum(druid: 'oo000oo0000')` - returns info as array of hashes
 
 ### Retrieve individual files from preservation
 
 - `client.objects.content(druid: 'oo000oo0000', filepath: 'my_file.pdf')` - returns contents of my_file.pdf in most recent version of Moab object
   - You may specify the version: