Merge pull request #46 from jeff1evesque/form_add_fields

#45: Add additional form fields
#47: Add 'html_form.js'
#47: 'tests/index.php', add classname to input-buttons
#47: html_form.js, outline general 'delegation listener'
#47: html_form.js, adjust comments
#47: html_form.js, change 'delegator_form()' -> 'delegator_callback()'
#47: html_form.js, add script tag reference to 'html_form.js'
#47: html_form.js, prefix 'delegator_callback()' with 'function' keyword
#47: html_form.js, remove extra paranthesis in 'alert()'
#47: html_form.js, let 'event delegator' parent element be 'form'
#47: html_form.js, use 'console.log()' instead of 'alert()'
#47: html_form.js, remove 'return' statement in the 'delegation' callback
#47: html_form.js, return classnames for 'Add more' button clicked
#47: index.php, fix typo for 'svm_clfn_indep' id
#47: html_form.js, add 'input' elements dynamically on 'Add more' click
Merge pull request #48 from jeff1evesque/js_html_form

#47: Add 'html_form.js'
#47: index.php, add 'id' attribute to 'svm_dataset_file' input