genericprojectmanager: code cosmetic

White space, namespaces, include order, comments, literal style,
remove unneded include/declarations etc.

Change-Id: Ifcb4371699c5cde244be1610b67cf81915cad2b2
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/genericprojectmanager/genericprojectmanager.cpp

@@ -39,7 +39,8 @@
 
 #include <QDebug>
 
-using namespace GenericProjectManager::Internal;
+namespace GenericProjectManager {
+namespace Internal {
 
 Manager::Manager()
 { }
@@ -77,3 +78,6 @@ void Manager::unregisterProject(GenericProject *project)
 {
     m_projects.removeAll(project);
 }
+
+} // namespace Internal
+} // namespace GenericProjectManager