test with ggplot2, export() and plot() instead of plotSparks()
fix exports
fix validity for sparkline if only NA values
geom_rect() instead of geom_bar(); multiple fixes
fix R-checks
fix point size
barCol for pos and neg values, barwidth used in both directions
Merge branch 'ggplot2_test' of https://github.com/alexkowa/sparkTable into ggplot2_test
renaming man-files
export() instead of plotSparkTable()
export() instead of plotGeoTable()
new version
Merge pull request #5 from alexkowa/ggplot2_test

Ggplot2 test