Adds additional output to the console.

Adds the number of lines, the number of missed lines and the set of missed lines.

Sample Output:
<pre>
+----------+---------------------------------+-------+--------+--------------------------------------------------------+
| coverage | file                            | lines | missed | missing                                                |
+----------+---------------------------------+-------+--------+--------------------------------------------------------+
|  17.24%  | bin/bin_file.rb                 | 174   | 144    | 32-36, 40-41, 45-47, 52-53, 57-60, 67, 71, 73-75, 7... |
|  37.88%  | lib/lib_file1.rb                | 66    | 41     | 11, 15, 17-19, 22-24, 28, 32-35, 41, 45-47, 50, 54,... |
|  61.54%  | lib/lib_file2.rb                | 13    | 5      | 13-17                                                  |
+----------+---------------------------------+-------+--------+--------------------------------------------------------+
</pre>

Also updated the MiniTest for Ruby 2.0.