Release 1.1.0

bump version to 1.1.0

Remove generated doxygen files

Fix install

base speculation staleness on time

Remove irreversible mode for 1.1 release

Improve error messaging for invalid requests

Previously, we based the stale speculation check on the `_production_enabled` flag which is set, at most, once per process.  This lead to a situation where a node which fell behind would still speculate.  This changes that check to be based on the age of the head block so, nodes which fall behind will stop speculating.  NOTE, this only affects speculative modes, actual production should attempt to proceed despite the age of the head block.

relates to EOSIO/eos#4649

When the server rejects a cleos RPC call as invalid (http 400) we now produce a more friendly error message

relates to EOSIO/eos#4613

restore docker compose lost in merge madness

add guard track to database

default cleos to IP to avoid alias issues

4297 delegatebw with buyram

nodeos option to explicitly export reversible blocks