Doc: Overhaul of doc/src/declarative and QtQuick2 docs.

-Consolidated model/view documentation into one.
-Added a new navigation for all overviews (grouped the pages)
-New front page that shows the grouping
-Separated the Qt C++ from the main QML overviews
-Consolidated Qt C++ into the "declarative runtime" section
-New articles about JavaScript, the engine, and plugins
-Fixed the older examples. New snippet comments
-Renamed some of the articles
-kept the qtquick2 qmlmodule
-"Qt Quick Elements"

Moved contents of doc/src/declarative into respective
module dirs.

-Qt Quick 2, LocalStorage, Particles, and QML are now
separate.
-Removed unused or duplicate documentation.
-edited C++ examples
-removed navigation and "\inqmlmodule QtQuick 2" for
those pages that are not in Qt Quick 2
-fixed doc/src/ licenses to header.FDL from qtbase

Change-Id: Ib36f9c07565d91160fa8d04f9670c438f684b82a
Reviewed-by: Sergio Ahumada <sergio.ahumada@nokia.com>

doc/config/style/qtquick.css

@@ -679,3 +679,85 @@
     }
 }
 /* end of print media */
+
+
+/* modify the TOC layouts */
+div.toc ul {
+    padding-left: 20px;
+}
+div.toc li {
+    padding-left: 4px;
+}
+/* Remove the border around images*/
+a img
+{
+    border:none;
+}
+
+/*Add styling to the front pages*/
+
+.threecolumn_area
+{
+    padding-top: 20px;
+    padding-bottom: 20px;
+}
+.threecolumn_piece
+{
+    display: inline-block;
+    margin-left: 78px;
+    margin-top: 8px;
+    padding: 0;
+    vertical-align: top;
+    width: 25.5%;
+}
+div.threecolumn_piece ul {
+    list-style-type: none;
+    padding-left: 0px;
+    margin-top: 2px;
+}
+div.threecolumn_piece p {
+    margin-bottom: 7px;
+    color: #5C626E;
+    text-decoration: none;
+    font-weight: bold;
+}
+div.threecolumn_piece li {
+    padding-left: 0px;
+    margin-bottom: 5px;
+}
+div.threecolumn_piece a {
+    font-weight: normal;
+}
+/* Add style to guide page*/
+.fourcolumn_area
+{
+    padding-top: 20px;
+    padding-bottom: 20px;
+}
+.fourcolumn_piece
+{
+    display: inline-block;
+    margin-left: 35px;
+    margin-top: 8px;
+    padding: 0;
+    vertical-align: top;
+    width: 21.3%;
+}
+div.fourcolumn_piece ul {
+    list-style-type: none;
+    padding-left: 0px;
+    margin-top: 2px;
+}
+div.fourcolumn_piece p {
+    margin-bottom: 7px;
+    color: #40444D;
+    text-decoration: none;
+    font-weight: bold;
+}
+div.fourcolumn_piece li {
+    padding-left: 0px;
+    margin-bottom: 5px;
+}
+div.fourcolumn_piece a {
+    font-weight: normal;
+}