Added wrapping Doxport manager class

This allows an encapsulation of the passes/action in use, outside of the
Command class hierarchy. Means Doxport is easier to use from contexts
other than CLI; just set up the Doxport service class, and run the
passes you obtain from it.
Configure the action before the file factory

So that the file factory can use the action to determine the output
directory
Fix up import command