use hardcoded namespace

The macro defined namespaces confused the hell out of lupdate and more or less broke translations permanently. Looks like the only way we can do it is to have a hardcoded namespace, which goes against my instinct, but honestly how likely is it that we'll change the namespace anyway (I guess forks might want to do it, but that's their problem ;) )

app/node/block/gap/gap.cpp

@@ -20,7 +20,7 @@
 
 #include "gap.h"
 
-OLIVE_NAMESPACE_ENTER
+namespace olive {
 
 GapBlock::GapBlock()
 {
@@ -51,4 +51,4 @@ QString GapBlock::Description() const
   return tr("A time-based node that represents an empty space.");
 }
 
-OLIVE_NAMESPACE_EXIT
+}

app/node/block/gap/gap.h

@@ -23,7 +23,7 @@
 
 #include "node/block/block.h"
 
-OLIVE_NAMESPACE_ENTER
+namespace olive {
 
 /**
  * @brief Node that represents nothing in its respective track for a certain period of time
@@ -46,6 +46,6 @@ private:
 
 };
 
-OLIVE_NAMESPACE_EXIT
+}
 
 #endif // TIMELINEBLOCK_H