Add RESTful API example code

tools/rest_api_examples/lib/string.rb

@@ -0,0 +1,22 @@
+# colorise # https://stackoverflow.com/questions/1489183/colorized-ruby-output
+class String
+def black;          "\033[30m#{self}\033[0m" end
+def red;            "\033[31m#{self}\033[0m" end
+def green;          "\033[32m#{self}\033[0m" end
+def brown;          "\033[33m#{self}\033[0m" end
+def blue;           "\033[34m#{self}\033[0m" end
+def magenta;        "\033[35m#{self}\033[0m" end
+def cyan;           "\033[36m#{self}\033[0m" end
+def gray;           "\033[37m#{self}\033[0m" end
+def bg_black;       "\033[40m#{self}\033[0m" end
+def bg_red;         "\033[41m#{self}\033[0m" end
+def bg_green;       "\033[42m#{self}\033[0m" end
+def bg_brown;       "\033[43m#{self}\033[0m" end
+def bg_blue;        "\033[44m#{self}\033[0m" end
+def bg_magenta;     "\033[45m#{self}\033[0m" end
+def bg_cyan;        "\033[46m#{self}\033[0m" end
+def bg_gray;        "\033[47m#{self}\033[0m" end
+def bold;           "\033[1m#{self}\033[22m" end
+def reverse_color;  "\033[7m#{self}\033[27m" end
+end
+