fix imports

Remove stray stub

tell travis to use go 1.16

Reading files (quii#465)

* wip - start of reading files

* everything is better with more Kent Beck quotes

* formatting

* small corrections

* extracting titles

* move post into a post file and some typos

* read description

* formatting

* minor edits

* reading tags and intro-ing final part

* first draft

* typos and grammar

* bit terser

* add link to files

* some waffle

* a bit of background and improved API

* furniture arranging

* some of the New calls weren't renamed to NewPostsFromFS in the text

* notes on steel thread

* typo

* minor grammar fix and not bothering to talk about the particular definition of unit tests

* blah

* adding some further reading, notes, link to DI chapter

* fix code snippet typing

* some typos and corrections

* add to toc

* better strapline

* Copy editing

Co-authored-by: ruthmoog <ruthmoog@gmail.com>

* less wordy

* brevity

* copy edits

* trim that prefix

* more copy editing

Co-authored-by: Chris James <quii@hey.com>
Co-authored-by: ruthmoog <ruthmoog@gmail.com>

Update hello-world.md

add missing chapter to ebook, fixing quii#427

mistake in example code

add missing chapters to epub

Update anti-patterns.md

Re-arranging things after some feedback

remove things from hello world, fixing quii#399