various: encapsulate all code in the olive namespace to avoid name collisions

Large-scale code cleanup. Also adds a license to the top of all files that were
missing it.

app/panel/viewer/viewer.cpp

@@ -20,6 +20,8 @@
 
 #include "viewer.h"
 
+OLIVE_NAMESPACE_ENTER
+
 ViewerPanel::ViewerPanel(QWidget *parent) :
   ViewerPanelBase(parent)
 {
@@ -39,3 +41,5 @@ void ViewerPanel::Retranslate()
 
   SetTitle(tr("Viewer"));
 }
+
+OLIVE_NAMESPACE_EXIT

app/panel/viewer/viewer.h

@@ -25,6 +25,8 @@
 
 #include "viewerbase.h"
 
+OLIVE_NAMESPACE_ENTER
+
 /**
  * @brief Dockable wrapper around a ViewerWidget
  */
@@ -38,4 +40,6 @@ protected:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // VIEWER_PANEL_H

app/panel/viewer/viewerbase.cpp

@@ -1,5 +1,27 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
 #include "viewerbase.h"
 
+OLIVE_NAMESPACE_ENTER
+
 ViewerPanelBase::ViewerPanelBase(QWidget *parent) :
   TimeBasedPanel(parent)
 {
@@ -58,3 +80,5 @@ void ViewerPanelBase::SetFullScreen(QScreen *screen)
 {
   static_cast<ViewerWidget*>(GetTimeBasedWidget())->SetFullScreen(screen);
 }
+
+OLIVE_NAMESPACE_EXIT

app/panel/viewer/viewerbase.h

@@ -1,3 +1,23 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
 #ifndef VIEWERPANELBASE_H
 #define VIEWERPANELBASE_H
 
@@ -5,6 +25,8 @@
 #include "panel/timebased/timebased.h"
 #include "widget/viewer/viewer.h"
 
+OLIVE_NAMESPACE_ENTER
+
 class ViewerPanelBase : public TimeBasedPanel
 {
   Q_OBJECT
@@ -34,4 +56,6 @@ public:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // VIEWERPANELBASE_H