Update PCL with Eclipse tutorial

Updated to make things more understandable and added some tips
- More information about the Eclipse formatter
- How to configure Eclipse (so that the indexer doesn't crash Eclipse)
- Comprehensive example

The image integration is not ideal; (see build/run icons); I did not manage to make something better!
I also added Eclipse logo to the tutorial index
This line applies to both "global" and "project specific" setups, so it should probably go directly under "setting the pcl code style in eclipse".