Moved the include/osgTXP back into src/osgPlugins/txp as a seperate include directory is no longer required.

Removed the osgtxp demo as it is no longer required.

src/osgPlugins/txp/WaitBlock.h

@@ -0,0 +1,35 @@
+#ifndef WAIT_BLOCK_H
+#define WAIT_BLOCK_H
+#ifndef WIN32
+#include <pthread.h>
+
+namespace osgTXP {
+
+struct WaitBlock{
+    pthread_mutex_t mut;
+    pthread_cond_t  cond;
+
+    WaitBlock()
+    {
+        pthread_mutex_init( &mut, 0L );
+        pthread_cond_init( &cond, 0L );
+    }
+
+    void wait()
+    {
+        pthread_mutex_lock( &mut );
+        pthread_cond_wait( &cond, &mut);
+        pthread_mutex_unlock(&mut);
+    }
+
+    void release()
+    {
+        pthread_mutex_lock( &mut );
+        pthread_cond_broadcast( &cond );
+        pthread_mutex_unlock( &mut );
+    }
+};
+}
+#endif
+#endif
+