Add options to pass map seed, map exchange string, map gen settings
and/or map settings when creating a save either through the create save
request or the load scenario request.
Remove the need for installing babel and the webpack loaders used in the
webpack.common.js file separately by resolving them from the web_ui
package. This allows future changes to done to the modules used without
having to update them in each plugin that uses the web_ui common config.
Add winston based logger for master, slave, ctl, lib, and web_ui code.
Logging done from slaves and instances are sent to the master server and
tagged with the instance and/or slave it originated from. This allows
for example error messages to propagate back to the source that iniated
the action. The master server also stores the log to allow it to be
queried at a later point. For slaves a copy of the slave's log is also
stored locally.