Change main command to "itemc" to avoid CraftBook confliction

Change main command to "itemc" to avoid CraftBook confliction with command "ic".
Fix update message

Fix the update message from "A new version of AreaProtect is available!" to the one inside the language file: "A new version of ItemCase is available!".
Fix metrics graph

Fix metrics graph to display correct results.
Add timeout feature to orders

Add a timeout feature to orders so they are automatically cancelled after 30 seconds.
Fix item duplication on server reload/restart (Fixed ItemCase-17)

When the server is reloaded or restarted some ItemCases duplicate their items and are able to be picked up.
Add german translation (Adds ItemCase-22)

Add a german locale.
Add the abillity to choose what blocks itemcases can use (Add ItemCase-18)

Add the abillity to allow itemcases to work on different blocks aside from slabs.
Fix event being canceled when creating ItemCase causing conflicts with other plugins (Fixes ItemCase-19)

Fix/Enhance the onPlayerInteract event being canceled when failing to create an ItemCase, causing plugin conflicts and spam.
Fix ItemCases not dropping inventory contents when destroyed (Fixed ItemCase-21)

Fix ItemCases not dropping their storage inventory when destroyed.
Update version info ready for next release

Update version info ready for next release inside the plugin.yml and pom.xml