Add customizable foreground color to CMatrix (#652)

* Final fixes, adding fg_ini as field

* Capital B changed to lowercase

res/config.ini

@@ -44,6 +44,9 @@ bg = 0
 # Foreground color id
 fg = 8
 
+# CMatrix animation foreground color id
+cmatrix_fg = 3
+
 # Border color
 border_fg = 8
 
@@ -164,4 +167,4 @@ xsessions = /usr/share/xsessions
 # Brightness control
 brightness_down_key = F5
 brightness_up_key = F6
-Brightness_change = 10
+brightness_change = 10