Import examples into demo so users can run them.
Merge pull request #360 from kohske/add-demo

Import examples into demo so users can run them.
update DESCRIPTION and bump version.
throw error if base64enc is not found, when trying to generate standalone charts.
fixes to let other packages to use showOutput.
Merge branch 'master' of https://github.com/ramnathv/rCharts
Merge branch 'master' into dimple_v2.0.0