Merge pull request #111 from jeff1evesque/doc_installation

#110: Add 'Note' to 'Installation' Subsection
#101: html_form_ajax.js, remove bad scoping of 'var', and change msg
Merge pull request #112 from jeff1evesque/js_html_form_ajax

#101: html_form_ajax.js, remove bad scoping of 'var', and change msg
#113: html_form_ajax.js, replace ajax callbacks with jQuery equivalent
Merge pull request #114 from jeff1evesque/js_html_form_ajax

#113: html_form_ajax.js, replace ajax callbacks with jQuery equivalent
#115: add ajax_loader.js
#115: add loading.gif
#115: form_svm.css, define style for '.ajax_loader'
#115: tests/php/index.php, add reference to 'ajax_loader.js'
#115: html_form_ajax.js, remove 'this' 'ajaxLoader()' param
#115: ajax_loader.js, remove options / class override
#115: html_form_ajax.js, call ajax_loader.js
#115: html_form_ajax.js, implement ajax overlay
Merge pull request #118 from jeff1evesque/js_ajax_loader

#115: Implement ajax overlay graphic
#120: ajax_loader.js, change opacity to 0.4
Merge pull request #121 from jeff1evesque/js_ajax_loader

#120: ajax_loader.js, change opacity to 0.4
#119: rename 'ajax_loader.js' -> 'ajax_graphic.js'
#119: tests/php/index.php, update reference to 'ajax_graphic.js'
Merge pull request #122 from jeff1evesque/js_ajax_loader

#119: Rename 'ajax_loader.js' to 'ajax_graphic.js'
#117: html_form.js, adjust 'Estimated Analysis' fieldset