Miscellaneous Fixes

[x3rt]

Changes

• Player#DropAllItems no longer throws an InvalidOperationException
• Player#ClearItems no longer throws an InvalidOperationException
• Player#Items no longer returns an Enumerable of nullable Items - as ItemBase itself is not null in InventoryInfo
  • Setting a groups permission to just * would previously throw an error
  • Using "*" or '*' would not work as it would interpret the entire string
• DefaultPermissionsProvider now uses .* for root permission
• DefaultPermissionsProvider ReloadPermissions now breaks out of the current for-loop instead of returning early out of the entire method
• PermissionsExtensions now allows the server-console to run commands

[ImBeryl]

Looks good, would look into maybe replacing the array conversion but otherwise great!