GPExpansion

Add /claim flags and /claim options commands

• New /claim flags [id] command to open the flag editor menu for that claim.
• New /claim options [id] command to open the claim options menu for that claim.
• New enchanted effect in claim list menus to show the claim you are currently standing in.
• Updated README.md with the new commands and permissions.
• Dev stuffs: No longer depending on GriefPrevention, PlaceholderAPI, packetevents in the pom.xml
• Bump version to 1.0.0 (stable)

0.1.10a...1.0.0