Fixed bug #14 -- block table is correctly re-build on periodical data reload.  fetchBlocks() is now updated on reload_interval rather than reload_chart_interval.
Added config option to disable the Github ribbon.
fix repeated blocks appear in "Recent blocks" table
fix display of node donation percentage
Code cosmetics
Merged with roy7 topnavbar changes
Merge branch 'iongchun-fix-recent-blocks' into devel
Merge branch 'iongchun-fix-donate' into devel
Minor fix