Right now __read() will stop reading at "OK" even if a ">" is still coming.
This can cause the ">" to be seen as the response to the next command, which
confuses the initialization sequence, since the initialization sequence
expects a very specific set of responses to its commands.

This changes __read() so that by default it only treats ">" as the response
terminator. When we issue the "ATLP" command to enter low-power mode, we will
use "OK" as the response terminator instead, since that's the only time we
don't expect to see a prompt.

This should fix brendan-w#226 and should also fix brendan-w#227.

Signed-off-by: Alistair Francis <alistair@alistair23.me>

Signed-off-by: Alistair Francis <alistair@alistair23.me>

Moving to a feature branch

This reverts commit 3ecbf6f.
This reverts commit eb8679e.

Also fixed some of the doc headers for more modern versions of mkdocs

…to 3.7 I hope