Sources & JavaDoc, overhauled package system

Add: The different QuarterBukkit modules now generate source and JavaDoc jars.
Note: The "package" archive is now called "bin".
Add: The bin archive contains the changelog.
Add: "sources" and "javadoc" package archives which contain the generated jars from the other modules.
Update changelog

Note: Update the changelog with the package system overhaul.
Fix JavaDoc errors

Fix: Some JavaDoc errors which created warnings at JavaDoc generation.
Copy ServerModsAPIQuery to integration

Fx: Copy some already fixed lines in the ServerModsAPIQuery over to the integration module.
Add private constructor for QuarterBukkitIntegration

Fix: You can no longer create instances of the static utility class QuarterBukkitIntegration.
Update changelog

Note: Update the changelog with the latest changes.