Use Unix standard for lines endings.
Use slf4j, backed by log4j2, instead of standard output. Resolves #2.
Correct import warnings.
Update artemis-odb API use: create using `EntityEdit` and no longer
needed to add entities to world.
Remove useless log.
Display origin class in logs.
Add discoveries up to bread.
Correct previous commit.
Add discoveries to road.
Add discoveries to religion.
More discoveries....
Customize Discovery reading from json to clarify object use.
Load effects from discoveries json file.
Can now get bonus on terrain type from discoveries.
Choices made by the empire apply the discovery effects a second time.
Display the effects in new discoveries.
Explain reasons behind the influence system implementation.
Add a simple API for map generation: just implement `MapGenerator`
interface and add reference in `MapGenerator.Generator` enum.
Remove now unused code.
Display player at screen center, fixes #6.