Update readme - feature complete

readme.md

@@ -4,13 +4,13 @@ A simple example of how to create a reusable Go module with commonly used tools.
 
 The included tools are:
 
--   [ ] Read JSON
--   [ ] Write JSON
--   [ ] Produce a JSON encoded error response
+-   [x] Read JSON
+-   [x] Write JSON
+-   [x] Produce a JSON encoded error response
 -   [x] Upload a file to a specified directory
 -   [x] Download a static file
 -   [x] Get a random string of length n
--   [ ] Post JSON to a remote service
+-   [x] Post JSON to a remote service
 -   [x] Create a directory, including all parent directories, if it does not already exist
 -   [x] Create a URL safe slug from a string