Merge pull request #119 from forio/documentation

add legends to some of the gallery pieces that have multiple data series...
added documentation placehodlers
Updated README.md
merge documentation branch into master
Merge pull request #123 from forio/documentation

fix contributing to be same content as on showcase/license.html
Fixed grunt linked task to generate dist/css
Changed the first color of the palettes to be blue instead of red
Included optimization in normalizeSeries to not duplicate data when data is in the correct format
Added setting of ticks property for linear & ordinal axes
Special case ticks = 0 in padding calculation for xAxis
Release 0.0.64
bar.padding --> bar.groupPadding
config.chart.internalPadding.* -- placeholder only until we can fix issue #125