gras: work on chart gui factory
gras: begin stubs for chart factory
gras: significant process on factory and filling in overhead_compare
gras: filled in the other chart types
gras: remove old default charts
gras: various tweaks to the js
gras: added close button to charts
gras: move more public vars into registry
gras: load/save for chart settings
gras: added io total counts chart
gras: page change color on offline
gras: revert this change while stats devel
Merge branch 'chart_factory'

completes #55