Add a survival value for ImageMaps

[prokopyl]

Enabling this option would require players in survival mode to have a certain amount of a configurable item in their inventory in order to get a map (using new, get, etc.). Removing ImageMaps from their inventory (using delete-like commands) would refund them entirely.

An integer ratio option would be added in order to "nerf" ImageOnMaps (example : 2 blank maps = 1 ImageOnMap, a ratio of 0 would disable the functionality entirely).

This is obviously useful for surival servers that allows their players to use ImageOnMaps, so they are not completely free, therefore limiting abuse.

[Vlammar]

To resume this feature:

• Be able to make a whole image glow using glow inc sac (use 1 per item frame that is not glowing)
• Survival craft:
  • [R][G][B] R: red dye, G: green dye, B: blue dye
  • [Gl][P][Gl] P: paper, Gl: glass
  • [R][G][B]
• being able to configure the ratio of maps used per render
• fixing map duplication issues
• uncraft an IoM map back to a survival map (mill stone or cartografer table?)