Merge branch 'deprecate' into 'master'

Add deprecation notice

See merge request !132

README.md

-# Build status
+# Notice
 
-[![build status](https://gitlab.coko.foundation/pubsweet/pubsweet-client/badges/master/build.svg)](https://gitlab.coko.foundation/pubsweet/pubsweet-client/builds)
-
-# Description
-
-This is the PubSweet client, to be used as a dependency in PubSweet apps, such as: [Editoria](https://gitlab.coko.foundation/editoria/editoria).
+Deprecated in favour of our monorepo: [https://gitlab.coko.foundation/pubsweet/pubsweet - client package](https://gitlab.coko.foundation/pubsweet/pubsweet/tree/master/packages/client)