Fix given examples

[atais]

Hello,

After installing the module I thought I could use some examples to help me in the beginning. I would be really glad if there were available online, but downloading the project is good enough.

However, I have found most of them do not work as they should. Below I present you a list of my suggestions and/or problems I have faced:

• examples available online or make examples section in readme and describe how to use them(?)
• npm install does not install peerDependencies. react and react-dom have to be installed manually
• barChart: what is "click me" button supposed to do? graph disappears
• cumulativeLineChart: only "Short" series is visible
• cumulativeLineChart: Re-scale y-axis does not work
• lineChart: after clicking "change data", tooltip legend is ghosting with old values
• multibarChart: grouped or stacked give the same result. add data?
• pieChart: labels and values are really confusing 😈

[atais]

@topicus I might have some spare time and I could adapt some examples to plunker versions.
Could you clarify the questions so I would know what to work with?