On PCL all vertices and normals exist only in float32 format. However,
   a lot of libraries and tools use float64 format. In original version,
   PCL don't recognize fields if types are not equals.

   This commit add auto type casting in conversion from
   pcl::PCLPointCloud2 to pcl::PointCloud<PointT>. This is allow read
   files, which are use float64 format.

   To reproduce test case, was written simple unit test.

…o type_casting_in_io