[+] Custom License Agreement

[~] Renamed plugin, moved from MyDonationGUI to DonationCampaign
[~] The aliases are changed and visible on the plugin page
[~] All permissions are adapted to the new name
[+] Added plugin link in config.yml

[+] Added line " gui-player-name-deleted: "&cDeleted"" in messages.yml for donor/owner to delete
[~] Fix bug when the menu opens and a donor player is offline, in which case the head could not be recovered
[~] Fix bug of null name when a donor player has been deleted
[~] Fix permission "mydonationgui.use"
[~] Fix permission "mydonationgui.unlock.*"
[~] Fix permission "mydonationgui.withdraw.*"
[~] Fix permission "mydonationgui.give.*"
[~] Fix permission "mydonationgui.create.*"
[~] Fix permission "mydonationgui.remove.*"
[-] remove "allow-owner-give" parameter in config.yml