Semi-colon separated sample data

[jakewendt]

The instructions say "Upload metagenomics report files from the local computer. If selecting multiple files does not work, please try with a different browser. With each sample set, you may also include meta-data with a colon-separated sample_data.csv file that has at least the columns 'Name' and 'ReportFile'.", but the source code that reads the file on line 19 of pavian/R/datainput-read_sample_data.R uses a semi-colon as the separator.