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/node/audio/pan/pan.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 "pan.h"
 
+OLIVE_NAMESPACE_ENTER
+
 PanNode::PanNode()
 {
   samples_input_ = new NodeInput("samples_in", NodeParam::kSamples);
@@ -72,3 +94,5 @@ void PanNode::Retranslate()
   samples_input_->set_name(tr("Samples"));
   panning_input_->set_name(tr("Pan"));
 }
+
+OLIVE_NAMESPACE_EXIT

app/node/audio/pan/pan.h

@@ -1,8 +1,30 @@
+/***
+
+  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 PANNODE_H
 #define PANNODE_H
 
 #include "node/node.h"
 
+OLIVE_NAMESPACE_ENTER
+
 class PanNode : public Node
 {
 public:
@@ -27,4 +49,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // PANNODE_H

app/node/audio/volume/volume.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 "volume.h"
 
+OLIVE_NAMESPACE_ENTER
+
 VolumeNode::VolumeNode()
 {
   samples_input_ = new NodeInput("samples_in", NodeParam::kSamples);
@@ -65,3 +87,5 @@ NodeInput *VolumeNode::samples_input() const
 {
   return samples_input_;
 }
+
+OLIVE_NAMESPACE_EXIT

app/node/audio/volume/volume.h

@@ -1,8 +1,30 @@
+/***
+
+  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 VOLUMENODE_H
 #define VOLUMENODE_H
 
 #include "node/node.h"
 
+OLIVE_NAMESPACE_ENTER
+
 class VolumeNode : public Node
 {
 public:
@@ -29,4 +51,6 @@ private:
 
 };
 
+OLIVE_NAMESPACE_EXIT
+
 #endif // VOLUMENODE_H