multithreaded download and files that probably should have been in the last

commit

For testing the new iteration, the texture cache disk download was written
into the main thread instead of into the separate threads. Now they're back
in separate threads again.

Also I think some of these files probably should have been in the previous
commit.

app/node/param.cpp

@@ -202,7 +202,6 @@ QByteArray NodeParam::ValueToBytes(const NodeParam::DataType &type, const QVaria
   case kFont: return ValueToBytesInternal<QString>(value); // FIXME: This should probably be a QFont?
   case kFile: return ValueToBytesInternal<QString>(value);
   case kMatrix: return ValueToBytesInternal<QMatrix4x4>(value);
-  case kFootage: return ValueToBytesInternal<float>(value); // FIXME: Unsustainble, find some other way to match Footage
   case kRational: return ValueToBytesInternal<rational>(value);
   case kVec2: return ValueToBytesInternal<QVector2D>(value);
   case kVec3: return ValueToBytesInternal<QVector3D>(value);
@@ -210,6 +209,7 @@ QByteArray NodeParam::ValueToBytes(const NodeParam::DataType &type, const QVaria
 
   // These types have no persistent input
   case kNone:
+  case kFootage:
   case kTexture:
   case kBlock:
   case kTrack: