Update apispark.md

updated packages (some were lacking)
Update apispark.md

refactored dependencies section, rephrased logging part
added screenshot for apispark tokens
Merge branch 'RFTicket943' of github.com:restlet/restlet-sites into RFTicket943
Update apispark.md

refactored doc as discussed with SSF
mixed up my tokens
Merge branch 'RFTicket943' of github.com:restlet/restlet-sites into RFTicket943
Merged branch RFTicket943.