Updating first link to Examples to same as one further down. Current URL
giving a 404
Reading the ID from the returned List<Tng> 'results', rather than from
the local copy ('thngs') — local copy had a null ID, causing a 400 error
Changing the List<Thng> that the example is trying to read (from
local to retrieved), so that ID is not null (was causing a 400 error).

Tidied other refactoring changes caused by my IDE in initial push
Reverting README to upstream
Reverting whitespace changes
Whitespace — tabs v spaces
Merge pull request #4 from another-dave/example-400-error

Fix the ThngApiExample error (returns 400 Not Found).