Update row_step when using copyPointCloud on PCLPointCloud2

Updates the row_step field on the output PCLPointCloud2 to reflect
changes in point cloud size.
fixed bug in quad mesh construction (wrong index order caused invalid quads)
Merge pull request #226 from dirkholz/fix_quadmesh

fixed bug in quad mesh construction (wrong index order caused invalid quads)
Merge pull request #222 from dimatura/copypointcloudfix

Update row_step when using copyPointCloud on PCLPointCloud2
Make fixes for VTK 6

This fixes compilation errors encountered when building PCL
against VTK 6 (from the current git master). The changes are
based on the recommendations in the VTK 6 migration guide [1].

This closes issue #199.

[1] http://www.vtk.org/Wiki/VTK/VTK_6_Migration_Guide
patches for VTK 6, QT 5 and VS 2012.
Merge branch 'master' of https://github.com/yangyanli/pcl