Selectable ores - Inspired by Gregicality

[mitchej123]

Let's you select ores/fluids and isolate them on the map, or show everything.

Double clicking the current selection will invert the background to make ores of light/dark color easier to see.

[mitchej123]

[Dream-Master]

nice idea

[mitchej123]

Needs to be tested on multiplayer; but good for review now

[mitchej123]

All good

Good for review, but hold off on merging - crash on ross with an NPE that I need to fix

[14:18:33] [Client thread/ERROR] [FML]: There was a critical exception handling a packet on channel DetravScanner
java.lang.NullPointerException
	at com.detrav.gui.textures.DetravMapTexture.getImage(DetravMapTexture.java:47) ~[DetravMapTexture.class:?]
	at com.detrav.gui.textures.DetravMapTexture.func_110551_a(DetravMapTexture.java:90) ~[DetravMapTexture.class:?]
	at com.detrav.gui.DetravScannerGUI.newMap(DetravScannerGUI.java:35) ~[DetravScannerGUI.class:?]
	at com.detrav.net.ProspectingPacket.process(ProspectingPacket.java:171) ~[ProspectingPacket.class:?]
	at com.detrav.net.DetravNetwork$HandlerShared.channelRead0(DetravNetwork.java:61) ~[DetravNetwork$HandlerShared.class:?]
	at com.detrav.net.DetravNetwork$HandlerShared.channelRead0(DetravNetwork.java:58) ~[DetravNetwork$HandlerShared.class:?]
	at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[SimpleChannelInboundHandler.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]
	at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]
	```

[Ethryan]

Looks good,
Havn't had time to test it but this looks like a welcome change

[bartimaeusnek]

I'll make a refactor PR once this is done.