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/window/mainwindow/mainmenu.cpp

@@ -33,6 +33,8 @@
 #include "widget/menu/menushared.h"
 #include "mainwindow.h"
 
+OLIVE_NAMESPACE_ENTER
+
 MainMenu::MainMenu(QMainWindow *parent) :
   QMenuBar(parent)
 {
@@ -621,3 +623,5 @@ void MainMenu::Retranslate()
   help_debug_log_item_->setText(tr("Debug Log"));
   help_about_item_->setText(tr("&About..."));
 }
+
+OLIVE_NAMESPACE_EXIT

app/window/mainwindow/mainmenu.h

@@ -27,6 +27,8 @@
 #include "dialog/actionsearch/actionsearch.h"
 #include "widget/menu/menu.h"
 
+OLIVE_NAMESPACE_ENTER
+
 /**
  * @brief Olive's main menubar attached to its main window.
  *
@@ -243,4 +245,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // MAINMENU_H

app/window/mainwindow/mainstatusbar.cpp

@@ -1,7 +1,29 @@
+/***
+
+  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 "mainstatusbar.h"
 
 #include <QCoreApplication>
 
+OLIVE_NAMESPACE_ENTER
+
 MainStatusBar::MainStatusBar(QWidget *parent) :
   QStatusBar(parent),
   manager_(nullptr)
@@ -53,3 +75,5 @@ void MainStatusBar::UpdateStatus()
     connect(t, &Task::ProgressChanged, bar_, &QProgressBar::setValue);
   }
 }
+
+OLIVE_NAMESPACE_EXIT

app/window/mainwindow/mainstatusbar.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 MAINSTATUSBAR_H
 #define MAINSTATUSBAR_H
 
@@ -6,6 +26,8 @@
 
 #include "task/taskmanager.h"
 
+OLIVE_NAMESPACE_ENTER
+
 /**
  * @brief Shows abbreviated information from a TaskManager object
  */
@@ -26,4 +48,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // MAINSTATUSBAR_H

app/window/mainwindow/mainwindow.cpp

@@ -28,6 +28,8 @@
 #include "mainmenu.h"
 #include "mainstatusbar.h"
 
+OLIVE_NAMESPACE_ENTER
+
 MainWindow::MainWindow(QWidget *parent) :
   QMainWindow(parent)
 {
@@ -323,3 +325,5 @@ void MainWindow::SetDefaultLayout()
   {height()/2, height()/2},
               Qt::Vertical);
 }
+
+OLIVE_NAMESPACE_EXIT

app/window/mainwindow/mainwindow.h

@@ -37,6 +37,8 @@
 #include "panel/pixelsampler/pixelsamplerpanel.h"
 #include "project/project.h"
 
+OLIVE_NAMESPACE_ENTER
+
 /**
  * @brief Olive's main window responsible for docking widgets and the main menu bar.
  */
@@ -86,4 +88,6 @@ private slots:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif