vt_kable_* is hardcoded to be latex

[thebioengineer]

for almost all vt_kable_* functions, the format argument is set to latex by default. Can we get away from setting it and just allow user to set via ... to kable? or not set at all?

vt_kable_* <- function(data, ...){
   ## function guts
   kable(data, ...)
}

[mariev]

I think the original intent was that minimal call to vt_kable* would give the object that SCHARP uses. I think we can get around this if we include knitr::opts_knit$set(out.format = "latex") in setup chunk for all templates

[thebioengineer]

if we render to pdf, kable would automatically do this though - is there a specific need to define the format?

[mariev]

addressed via #110 & #115