added bib entry for request-response image
added image for request-response model
added TOC on a new page
include image for request response model
print Vökler properly
adjust image size
added ajax request diagram
added bib entry for ajax request diagram
added ajax request diagram to paper
added list of abbrevs updates #6
changed bib lookup

bib type @online is not recognized by either BibDesk or JabRef and
causes unrecognized error messages in the log
added LOF updates #7
added new introduction updates #3
update reflecting recent changes