Merge branch 'info-metro' into gh-pages
Merge branch 'info-metro' into gh-pages
Add description file for variable

Each description file should have the same name of the variable it
describes.
Variable txt div in the variable info box

Variable infobox (div variablebox) is divided in 2:
- plot
- variabletxt
Update variabletxt on change
Load variable txt and process math

Using MathJax
Update HHI description
Merge branch 'info-variable' into gh-pages
Merge branch 'gh-pages' into info-metro