Need to rename functions "seq.pdb()" and "split.pdb()"

[Barry Grant]

Could change to "pdbseq()" and "pdbsplit". Should try to have some consistency with functions names - previously we tried to use "task"."object to act on" e.g. read.dcd() seq.pdb().

• checking S3 generic/method consistency ... WARNING seq: function(...) seq.pdb: function(pdb, inds, aa1)

split: function(x, f, drop, ...) split.pdb: function(pdb.files, path, multi)

[Barry Grant]

Propose changing to pdbseq() and pdbsplit()