more work
refactor rename
refactor
refactor: cache formatter
move more calculation into the background job
default target of 10
ToBeat ==> Target
ToBeat ==> Target
added answer crosshair to graph
silence eclipse complaint
first crude version of formula text
used resources for formula parameters
use unicode for formula characters
fixed messy stroke font on graph rendering
done with background graph cleanup
saving and restoring instance state via bundles