Typo

[love-bees]

There's a typo in the last paragraph in the README introduction part:

Sonnet is also designed to be simple to understand, our code is (hopefully!) clear and **focussed**. Where we have picked defaults (e.g. defaults for initial parameter values) we try to point out why.

Should be focused instead of focussed

[chr1sj0nes]

"focussed" is acceptable British English.