[css-multicol] Update specs to clarify levels

The existing module is level 1 and its successor is level 2,
Not 3 and 4.

Author: frivoal

css-multicol-4/Overview.bs renamed to css-multicol-2/Overview.bs

@@ -1,18 +1,18 @@
 <pre class="metadata">
-Title: CSS Multi-column Layout Module Level 4
+Title: CSS Multi-column Layout Module Level 2
 Group: CSSWG
 Shortname: css-multicol
-Level: 4
+Level: 2
 Status: ED
-ED: http://dev.w3.org/csswg/css-multicol-4/
+ED: http://dev.w3.org/csswg/css-multicol-2/
 Editor: Florian Rivoal, Invited Expert, florian@rivoal.net, http://florian.rivoal.net/
 Abstract: This specification describes multi-column layouts in CSS, a style sheet language for the web. Using functionality described in the specification, content can be flowed into multiple columns with a gap and a rule between them.
 Abstract:
-Abstract: This is a delta specification over CSS Multi-column Level 3.
-          Once the level 3 specification is final,
+Abstract: This is a delta specification over CSS Multi-column Level 1.
+          Once the level 1 specification is final,
           its content will be integrated into this specification,
           which will then replace it.
-          Until then, CSS Multi-column Level 4 only contains additions and extensions to level 3
+          Until then, CSS Multi-column Level 2 only contains additions and extensions to level 1
 Ignored Terms: column-width, column-count, columns, column-gap, column-rule-color, column-rule-style, column-rule-width, column-rule, column-fill
                <!-- remove line above once this is no longer a delta spec -->
 </pre>
@@ -41,7 +41,7 @@ This document defines new features not present in earlier specifications.
 In addition, once final, it will replace and supersede the following:
 
 <ul>
-<li>The <a href="http://www.w3.org/TR/css3-multicol">CSS Multi-Column Layout Module Level 3</a>
+<li>The <a href="http://www.w3.org/TR/css3-multicol">CSS Multi-Column Layout Module Level 1</a>
 </ul>
 
 <h2 id="the-multi-column-model">

css-multicol/Overview.bs

@@ -1,8 +1,8 @@
 <pre class="metadata">
-Title: CSS Multi-column Layout Module
+Title: CSS Multi-column Layout Module Level 1
 Group: CSSWG
 Shortname: css-multicol
-Level: 3
+Level: 1
 Status: ED
 ED: http://dev.w3.org/csswg/css-multicol/
 TR: http://www.w3.org/TR/css3-multicol/