QmlJS: Separate metaObjectRevision from minor version number.

They need not to be identical. Additionally:
* Rename ImportInfo::name to path, because that's what it does.
* Add ImportInfo::name, for getting the uri with the names
  separated by dots.
* Allow for exportMetaObjectRevisions in qmltypes files.
* Allow for exports with an empty type name, as generated by
  qmlRegisterRevision. They are used for associating meta object
  revisions with non-exported types.
* Rewrite the Qt 4.7 import to QtQuick 1.0 at an early stage. In
  preparation for the Qt 5 type information update, where Qt 4.7
  is gone.

Change-Id: Ia287193623d9530a56b9eb8d2481d50aabd94c3e
Reviewed-on: http://codereview.qt-project.org/5309
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@nokia.com>

src/plugins/qmljseditor/qmljseditor.cpp

@@ -1302,7 +1302,7 @@ TextEditor::BaseTextEditorWidget::Link QmlJSTextEditorWidget::findLinkAt(const Q
         // if it's a file import, link to the file
         foreach (const ImportInfo &import, semanticInfo.document->bind()->imports()) {
             if (import.ast() == importAst && import.type() == ImportInfo::FileImport) {
-                BaseTextEditorWidget::Link link(import.name());
+                BaseTextEditorWidget::Link link(import.path());
                 link.begin = importAst->firstSourceLocation().begin();
                 link.end = importAst->lastSourceLocation().end();
                 return link;