Convert heal flags datatype from integer to double.

Existing data should be cast with no data loss.
Update Bukkit dependency to version 1.6.1-R0.1-SNAPSHOT.
Changed DoubleFlag and IntegerFlag to take java.lang.Number objects in unmarshal().
Fixed -w flag for /rg load and /rg save.
Bumped version to 5.8-SNAPSHOT, updated CHANGELOG.txt.
Updated org.bukkit:bukkit dependency to 1.6.2-R0.1-SNAPSHOT.
Updated Maven release plugin to 2.4.1.
[maven-release-plugin] prepare release 5.8
[maven-release-plugin] prepare for next development iteration
Allow the console to load/save all region managers with one command.
Allow players to add newlines (\n) via command, not just manually in yml.
Changed entity report format slightly.

This makes it clearer to users what that floating point number means.
Fixed milking cows in protected areas.
It seems that Bukkit changed the return of the bucket/itemstack
methods in the event, causing WG to think a different bucket was used.
Fixed addowner/addmember commands adding command artifacts.
Specifically, "-w <world>" will no longer be added when using it.
This requires WorldEdit with commit cd5f832 or newer.
Additionally fixed a typo: DefaultDomain.removaAll -> removeAll.
Added config option and flag to prevent soil from drying naturally.
Added snow-fall-blocks option to config to restrict snow fall to certain blocks
Send item-use blacklist event when right-clicking entities.
There have been bigger non-backwards-compatible changes since.
Update CommandBook dependency to 2.3.
Added allow-tamed-spawns setting, on by default.
This will stop WorldGuard from culling tamed animals
in regions with mob-spawning deny when they log in
with their owner.