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/common/timerange.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 "timerange.h"
 
 #include <utility>
 
+OLIVE_NAMESPACE_ENTER
+
 TimeRange::TimeRange(const rational &in, const rational &out) :
   in_(in),
   out_(out)
@@ -94,11 +116,6 @@ void TimeRange::normalize()
   length_ = out_ - in_;
 }
 
-uint qHash(const TimeRange &r, uint seed)
-{
-  return qHash(r.in(), seed) ^ qHash(r.out(), seed);
-}
-
 void TimeRangeList::InsertTimeRange(const TimeRange &range)
 {
   for (int i=0;i<size();i++) {
@@ -177,3 +194,10 @@ TimeRangeList TimeRangeList::Intersects(const TimeRange &range)
 
   return intersect_list;
 }
+
+uint qHash(const TimeRange &r, uint seed)
+{
+  return qHash(r.in(), seed) ^ qHash(r.out(), seed);
+}
+
+OLIVE_NAMESPACE_EXIT