Using LogManager instead of FMLRelaunchLog to access the logger instance.
Added logging of the name of failed exports instead of exception.
Improved crafting log to include issuer including their location and the
requested item.
Removed superfluous FMLRelaunchLog instance.
Removed superfluous parameters for PlayerData constructor.
ModVersionFetcher will now return a MissingVersion in case of an exception
instead of letting it propagate upwards.
Also added a generic try/catch to the VersionChecker itself, just in case
any unchecked exception might be triggered inside the thread and at least
not logged correctly.
Reworked whole Version Checker with an extensible interface to add any other service later on easier.
The version checker now has its own config file, to collect the different options and extract them from the main config file.
In that you can specify how fine the versions should be checked.
