Merge pull request #759 from jeff1evesque/csv_sample

#756: sample.csv, minor adjustment in column heading
#757: sample-1.csv, add file
Merge pull request #760 from jeff1evesque/csv_sample_1

Add 'sample-1.csv' to the 'test/' subdirectory
#757: sample-1.css, add semi-duplicated records
#757: sample-1.css, fix typo
Merge pull request #761 from jeff1evesque/csv_sample_1

#757: add additional duplicated records to 'sample-1.csv'
#755: html_form.js, remove generated HTML elements associated with indep vars
Merge pull request #762 from jeff1evesque/js_html_form

#755: Remove generated HTML elements
#752: data_validator.py, determine how to remove first column
#752: data_validator.py, uncomment code
#752: data_validator.py, adjust comment
#752: data_validator.py, add comment
#752: data_validator.py, validate first record of first column
#752: data_validator.py, adjust error message
#752: data_validator.py, fix typo
#752: data_validator.py, add comment
#752: data_validator.py, adjust variable name
#752: data_validator.py, validate remaining column items (labels)
#752: data_validator.py, adjust error message
Merge pull request #763 from jeff1evesque/python_data_validator

#752: Restructure 'dataset_validation'