Wordcloud

[KevCaz]

Currently, the wordcloud on the index page is troublesome for at least 3 reasons:

1. most browser often fails to display it coreectly (reloading several times help but it's not a solution);
2. we have to rebuild it each time the index page is regenerated;
3. the data are stored in a dropbox and therefore not available for everyone;

I propose to generate the worcloud as a standalone html file and then include it within an iframe. It may not be the best solution but this should solve the points raised above.

[KevCaz]

I have made few changes to fix this:

• I have used a .png image instead of a "hard to load" html widget;
• make wordcloud now calls the R script to generate the html widget (then simply load it in your web browser and screenshot the wordcloud, note that I was not able to use webshot::webshot())