Fix issues with double damage, double death messages, and other damage oddities.

Fixes #1450
Changed various values to double in advanced.yml for the sake of consistency.
Update changelog.
Update pom.xml for 1.4.07 beta release (finally!)
Back to active development.
Fixed a bug where Kraken messages couldn't be disabled.

Fixes #1174
Allow less than one percentages for hardcore losses
These duplicate checks are handled in config validation.
Fix NPE on /addxp
Switch to H31ix's updater for security reasons.
Condense this into one function.
Remove use of deprecated function.
Use doubles in config.yml where appropriate. Change item IDs to item names
in light of upcoming Minecraft changes that will remove access to item
IDs.
Make Updater work with our versioning setup.
Added Horses to the "Shake" ability.
Witches no longer drop water bottles from Shake, since they no longer drop them in Vanilla.
Changed format of treasures.yml.

**YOU WILL NEED TO UPDATE YOUR FILE TO THE NEW FORMAT**
Fix dropping sideways logs and leaf blocks.

Fixes #1460
Fix formatting of the new Updater
Refactor to getMaxLength
Warn if treasures.yml is outdated.
Don't keep trying to load if they've got an old file.