removed unused original files

decided these are more clutter than anything else. Original files are
all linked to in the readmes in any case
added Pyron_2011

Original_study
Pyron RA, Wiens JJ (2011) A large-scale phylogeny of Amphibia including
over 2800 species, and a revised classification of extant frogs,
salamanders, and caecilians. Molecular Phylogenetics and Evolution
61(2): 543-583. doi:10.1016/j.ympev.2011.06.012

Original_dataset
Pyron RA, Wiens JJ (2011) Data from: A large-scale phylogeny of
Amphibia including over 2800 species, and a revised classification of
extant frogs, salamanders, and caecilians. Dryad Digital Repository.
doi:10.5061/dryad.vd0m7

Dataset_license
CC0, http://creativecommons.org/publicdomain/zero/1.0/

#Taxa
2872

#Sites
12712

#data_blocks
34

#Clade
Amphibia (frogs, toads, salamanders, caecilians)