(profiler Reader) Added self_duration field for statistics;
(profiler Reader) Removed #ifdef macros;
(profiler Reader) moved BlocksTree, BlocksTreeRoot and thread_blocks_tree_t types inside profiler namespace;
(profiler GUI) Added globals.h and globals.cpp containing global variables and signals; Added profiler_gui namespace;
(ProfTreeWidget) Added context menu "Select columns" to make it possible to hide columns;
(ProfTreeWidget) Added percent statistics for blocks (Self %, Parent % and Frame %); Added displaying of total thread duration;
(ProfGraphicsScrollbar) Added context menu to make it possible to choose which thread to display on minimap;
(ProfGraphicsView) Highlighting currently selected thread;
