Add "Random" for 255 colors mode

Thus we can specify "random" for 8 colors mode, or "Random" for 255 colors.

README.md

@@ -20,11 +20,14 @@ If you ask for less colors, the last one will be duplicated across remaining
 groups.
 
 Available colors are: blue, black, yellow, cyan, green, magenta, white, red,
-rainbow, random, or any number between 0 and 255.
+rainbow, random, Random or any number between 0 and 255.
 
 Available styles are: normal, bold, faint, italic, underline, blink,
 rapid_blink, reverse, conceal or random.
 
+`Random` will color each matching pattern with a random color among the 255
+available in the ANSI table. `random` will do the same in 8 colors mode.
+
 When not specified, a *COLOR* defaults to _red_ and a *STYLE* defaults to _bold_.
 
 `colout` is released under the GNU Public License v3.

colout.py

@@ -50,7 +50,7 @@ def colorin( text, color = "red", style = "normal" ):
     stop = "\033[0m"
 
     # Convert the style code
-    if style == "random":
+    if style == "random" or style == "Random":
         style = random.choice(list(styles.keys()))
     else:
         assert( style in styles)
@@ -62,6 +62,11 @@ def colorin( text, color = "red", style = "normal" ):
         color_code = random.choice(list(colors.values()))
         color_code = str( 30 + color_code )
 
+    elif color == "Random":
+        mode = 256
+        color_nb = random.randint(0,255)
+        color_code = str( color_nb )
+
     elif color == "rainbow":
         global rainbow_idx
         mode = 8