Missing documentation for data-graph-yaxis attributes

[agallou]

We can write

  <table class="highchart"
       data-graph-type="line"
       data-graph-container-before="1"
       data-graph-xaxis-type="datetime"
       data-graph-yaxis-1-title-text="Item1"
       data-graph-yaxis-2-title-text="item2"
       data-graph-yaxis-2-reversed="1"
       data-graph-yaxis-2-opposite="1"
       data-graph-point-callback="callback"
       data-graph-yaxis-1-min="0"
       data-graph-yaxis-1-max="16"
       data-graph-yaxis-2-min="0"
  >
  <caption>titre</caption>
  <thead>
    <tr>
      <th>Date</th>
      <th>serie1</th>
      <th>serie2</th>
      <th data-graph-yaxis="1">serie3</th>

Those attributes are missing in the documentation

• data-graph-yaxis-X-min
• data-graph-yaxis-X-max
• data-graph-yaxis-X-title-text
• data-graph-yaxis on th