initial commit of properly saving datapackages
mapped_reads --> number_mapped
remove pdb/set_trace()
remove pooled samples from data
add all datapackage parameters to study object
Add option to not load species data
add more datapackage attributes to reading the datapackage
fixing up datapackage stuf
test Study.save() works!!!
test passing??
Merge pull request #96 from YeoLab/feature/save_study_phenotype

Feature/save study phenotype