Covariance data for generating forest plots using Excel macros

[andkov]

@ampiccinin @annierobi

All tables with model results (correlations/covariances) are available at:
https://github.com/IALSA/IALSA-2015-Portland/tree/master/reports/correlation-3/table-data

For three tracks (gait-cognitive, grip-cognitive, and pulmonary-cognitive) there will be three formats of the data (full, brief, and meta). The latter (meta) has been specifically developed according to specifications given by Sean Clouston.

'andro` - means that that table does not split data by genders.