Moved colorBrewer so it can be accessed from command line and added t…

…he missing function colorspec2rgb, relating to Issue #24

private/colorspec2rgb.m

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+function rgb = colorspec2rgb(c)
+% COLORSPEC2RGB converts a colorspec to truecolor.
+% Usage:
+%   rgb = colorspec2rgb(c)
+% Where:
+%   c is a color - either rgb or any of the letters in 'rgbwcmyk'
+%
+% COLORSPEC2RGB converts a character colorspec into a truecolor rgb
+% representation. If c is not a character then it is returned as rgb - so
+% that it will not affect index or truecolor variables that are input.
+%
+% Author: Nick Linton (2011)
+% Modifications - 
+
+
+rgbspec = [1 0 0;0 1 0;0 0 1;1 1 1;0 1 1;1 0 1;1 1 0;0 0 0];
+cspec = 'rgbwcmyk';
+
+% Deal with string color specifications.
+if ischar(c),
+  k = find(cspec==c(1));
+  if isempty(k)
+      error('COLORSPEC2RGB: Unknown color string.'); 
+  end
+  if k~=3 || length(c)==1,
+    rgb = rgbspec(k,:);
+  elseif length(c)>2,
+    if strcmpi(c(1:3),'bla')
+      rgb = [0 0 0];
+    elseif strcmpi(c(1:3),'blu')
+      rgb = [0 0 1];
+    else
+      error('COLORSPEC2RGB: Unknown color string.'); 
+    end
+  end
+elseif isreal(c) && size(c,2)==3
+    rgb = c;
+else
+    error('COLORSPEC2RGB: Unknown color format.');
+end
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