HAI_vs_GE.Rmd : removed the custom style sheet definitions as well as the script tag for loading JS libraries and generating the dataTable

begin.html : moved the dataTable's css and JS files fetching here to the main .html file

HAI_vs_GE.js :
- fixed the processing mask
- fixed error messaging capability
- added a call to generate the dataTable

HAI_vs_GE.css : moved the custom style sheet definitions here to the main .css file

HAI_vs_GE_Lib.js : disambiguated the HAI_vs_GE namespace by renaming it to HAI_vs_GE_Lib