This converts a specification like PredictiveEcology/Require@development
into separate columns, "Account", "Repo", "Branch", "GitSubFolder" (if there is one)
parseGitHub(pkgDT, verbose = getOption("Require.verbose"))A pkgDT data.table.
Numeric or logical indicating how verbose should the function
be. If -1 or -2, then as little verbosity as possible. If 0 or FALSE,
then minimal outputs; if 1 or TRUE, more outputs; 2 even more. NOTE: in
Require function, when verbose >= 2, the return object will have an
attribute: attr(.., "Require") which has lots of information about the
processes of the installs.
parseGitHub returns a data.table with added columns.
parseGitHub turns the single character string representation into 3 or 4:
Account, Repo, Branch, SubFolder.