read_study_design: Utilities for reading study design files.
In vladpetyuk/PlexedPiper: Pipeline for isobaric quantification.

Fetches study design results from either local folder of DMS. Checks that study design files are internally consistent. DMS functionality not useful outside of PNNL unless connected through VPN.

* 'read_study_design()': returns a list of study design tables, accessible by $ * 'read_study_design_from_DMS()': finds data package folder in DMS and calls read_study_design there

1	read_study_design(path_to_study_design)

`path_to_folder`	(string) path to folder containing study design files
`dataPkgNumber`	(integer) data package number for DMS

study_design <- read_study_design("data/study_design_folder")

fractions  <- study_design$fractions
samples    <- study_design$samples
references <- study_design$references


study_design <- read_study_design_from_DMS(3606)

fractions  <- study_design$fractions
samples    <- study_design$samples
references <- study_design$references