fixed concurrency issues
cleanup download code
refactoring DRG dowload
bug fix: make sure data does not paint behind the map
bug fix
major content reorganization
remove test
html fixes
cleanup
mobile view optimization
responsive changes; scale SVG
svg scaling
more mobile svg problems
test
fixed drg model;
normalized data model
added south
updated data loading scripts
added multi level menu
remove old data
multi-level menu