* update copyright
* fix css parsing
* fix block name search
* add matching text highlighing for find results
* add calculation of block statistics for selected area
* new action: right-click on a block on "Diagram" selects region using left and right bounds of this block
* other optimizations
(profiler_gui) Moving sources into separate files;
(profiler_gui) Rename Prof* classes into Easy*;
(EasyGraphicsView) Optimized performance by not painting items which were not expanded in TreeWidget. While there are no range selected for TreeWidget, only top-level blocks are painted on scene.