* ci: break config into separate files

* Untangle githooks

* githooks: fix whitespace

* .hooks/pre-commit: add ui -> lint-staged check

- We no longer require dependency on husky with this change.

* ui: remove husky dependency and config

- The previous commit obviates the need for it.
- We will now have to manage these hooks by hand, but this removes
  the conflict between husky-installed hooks and those in the .hooks dir.

* ui: update yarn.lock with husky removed

* .hooks/pre-commit: always use subshell + docs

- Always use subshell means we consistently exit from the
  same place which feels less complex.
- Docs are necessary for horrible bash like this I think...

* Makefile: remove old husky githooks

- Husky has installed a handler for every single git hook.
- This causes warnings on every git operation.
- Eventually we can remove this, but better not to confuse
  people with these messages for now.

* ci: fix go build tags

* Makefile: improve compatibility of rm call

- Looks like the xargs in Travis does something different to the one
  on my mac, this more verbose call should be safe everywhere.

* ci: fix make target names

* ci: fix test-ui invocation

* Makefile: simplify husky hook cleanup

* ci: more focussed readme