spiked line chart implementation
spiked transition on line chart
added test case for line chart path drawing
improved dynamic y axis range calculation
added default impl of x/y value getter
moved x/y value getter to the base chart
fixed broken unit tests caused by refactory
v0.3.0 release
renamed key/value functions
created bubble chart skeleton impl
improved y axis dynamic rendering
implemented basic bubble drawing
implemented bubble drawing and validation
added test case validating cx calculation for bubble
added test case validating cy calculation for bubble
added test case validating r calculation for bubble
added transition to bubble chart
added color and index based css class support to bubble rendering
added colored filling to bubble rendering
introduced grouping in bubble rendering