QmlJS: Use mime types to distinguish qml and js files.

This allows adding patterns to the qml mime type in the options dialog.
Previously they were always parsed as js.

Change-Id: Ifa344fb6ab8cbcda02becef991cf6807615a1caa
Reviewed-on: http://codereview.qt-project.org/4515
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>

src/plugins/qmljstools/qmljsmodelmanager.h

@@ -55,6 +55,10 @@ class CppModelManagerInterface;
 }
 
 namespace QmlJSTools {
+
+QMLJSTOOLS_EXPORT QmlJS::Document::Language languageOfFile(const QString &fileName);
+QMLJSTOOLS_EXPORT QStringList qmlAndJsGlobPatterns();
+
 namespace Internal {
 
 class PluginDumper;