Upgrade to Aesh 1.0

Aesh 1.0 has been released, and is currently used by Wildfly 12.x. 1.0 has several differences to Aesh 0.66.x, most notably the introduction of the aesh-readline project and the removal of AeshConsoleCallback. The upgrade is non-trivial, however due to some of the new features provided by Aesh 1.x, it could greatly reduce the amount of code required.