Use NatTable instead of JFace TableViewer

[rdiachenko]

NatTable is a flexible and powerful plugin for creating tables/grids which have a higher performance on big data comparing to JFace TableViewer.

So, we have to investigate this tool and implement it in JLV Eclipse plugin instead of the current JFace implementation.

More information about NatTable is here: http://www.eclipse.org/nattable/ and here: http://www.vogella.com/tutorials/NatTable/article.html