Merge pull request #236 from jeff1evesque/php_logic_loader

#232: logic_loader.php, rename corresponding form fields
#237: html_form.js, change references of 'analysis_models' -> 'model_type'
#237: html_form.js, change references of 'training_type' -> 'model_type'
Merge pull request #238 from jeff1evesque/js_html_form

#237: Additional form attribute changes in 'html_form.js'
#232: logic_loader.php, 'unset(this->form->model_type)'