Provide two build flavours 'Foss' and 'Play', the 'Play' flavour is
unchanged to what we had before. The 'Foss' flavour removes the
dependence on proprietary libraries.

This removes crashlytics, instead logging to the local log.

It also removes firebase/gcm messaging, disabling push functionality.
For now there is no replacement for this.

[CHORE] Update dependencies

[MERGE] 2.5.1 to develop

Added missing spanish translations

[BUG] Fixed black colour not selected

merge

[HOTFIX] Ordered list should iterate over its direct child first

[RELEASE] merge 2.5.1 to master

[FIX] Check if we are in a RESUMED state before showing the Dialog.

[IMPROVEMENT] More idiomatic kotlin

[NEW] WordPress Oauth login support

Custom (WordPress on-premise) and WordPress-Com.

[FIX] Opened notifications not cleared

[FIX] fix auth deeplink

[FIX] Fix uppercase url scheme