Added imagecon README.md

tools/imagecon/README.md

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+imagecon
+========
+
+Generate amiga data/files from a PNG image file.
+
+usage
+-----
+    ```
+imagecon: --input <input.png> [options]
+Options:
+  --output <output prefix>
+  --colors <max colors>
+  --quantize
+  --output-palette
+  --override-palette <palette file>
+  --verbose
+```
+
+The following files will be generated:
+    1. <output prefix>.bin		binary interleave bitplane data
+    2. <output prefix>-copper-list.s 	m68k assembler syntax copper list with no symbols
+    3. <output prefix>.pal		(optional) palette file listing the palette colors as hex
+
+options
+-------
+**--output** <output prefix>
+Specify the prefix for the output file set. Extentions will be added to this. Default is the input file name minus the extension.
+
+**--colors** <max colors>
+Specify the maximum number of colors allowed in the palette. Acceptable values are from 2 to 32.
+
+**--quantize**
+Convert the image to use less colors.
+
+**--output-palette**
+Generate a palette file of the final palette used. Output will be the output file with the ".pal" extension.
+
+**--override-palette** <palette file>
+Specify a palette file to use that will override the image or quantized palette. Also overrides the --colors option.
+
+**--verbose**
+Display debugging information
+
+example
+-------
+    ```
+    ./imagecon --input full_color.png --output image-data --quantize --colors 32 --palette
+```