Filter_Cloud: Added Read function for pcd files
Fixed bugs:
- Find ".pcd" instead "." to avoid "directory jumps" in the given
parameter
Filter_Cloud:
- Visualization routines: Ready

Note: To avoid future errors be careful initialize the Point Clouds
before to load pcd files.
Filter_Cloud:
- Read / Write PCD files ready!
- Keyboard Callbacks ready!

- Apply filters "live" dont work <- Working it