Rcpp branch: add lattice parameters in Rcpp version of read.pdb

[Lars Skjærven]

see commit: https://bitbucket.org/Grantlab/bio3d/commits/8f7dec88f8dd50705b5c1607b435de4ea14fec82#chg-ver_devel/bio3d/R/read.pdb.R

Is this used by the shiny branch by the way?

[Barry Grant]

Not currently no. In the future we may want to work with this and biounit reconstructions etc. but for now we are keeping it simple

[Lars Skjærven]

added to feature_visualize_dataframe commits:

• caf0706
• f21ff07