Pull and store info on Stata versions

[larsvilhuber]

See https://gist.github.com/larsvilhuber/6bcf4ff820285a1f1b9cfff2c81ca02b for how to collect the information, which should then be added/appended/inserted into the YAML.

/* It will provide some info about how and when the program was run */
/* See https://www.stata.com/manuals13/pcreturn.pdf#pcreturn */
local variant = cond(c(MP),"MP",cond(c(SE),"SE",c(flavor)) )  
di "=== SYSTEM DIAGNOSTICS ==="
di "Stata version: `c(stata_version)'"
di "Updated as of: `c(born_date)'"
di "Variant:       `variant'"
di "Processors:    `c(processors)'"
di "OS:            `c(os)' `c(osdtl)'"
di "Machine type:  `c(machine_type)'"
di "=========================="

possibly add

c(max memory) 

but may not be reliable.