Add documentation and fix book icons

src/main/java/com/sosnitzka/taiga/generic/BasicTinkerFluid.java

@@ -4,12 +4,17 @@ import net.minecraft.util.ResourceLocation;
 import slimeknights.tconstruct.library.Util;
 import slimeknights.tconstruct.library.fluid.FluidMolten;
 
+/**
+ * A "wrapper" for FluidMolten that makes construction and manipulation easier
+ */
 public class BasicTinkerFluid extends FluidMolten {
 
     private boolean toolForge;
 
     public BasicTinkerFluid(String fluidName, int color, boolean toolForge, int temp, int lumen, int visk) {
+        // Constructs the FluidMolten with textures and color
         super(fluidName, color, new ResourceLocation("tconstruct:blocks/fluids/molten_metal"), new ResourceLocation("tconstruct:blocks/fluids/molten_metal_flow"));
+        //Settings
         this.setUnlocalizedName(Util.prefix(fluidName));
         this.setTemperature(temp);
         this.setLuminosity(lumen);