Group user edits by RDF class, Jena 3.17.0 , Play 2.8.5

Lots of enhancements and fixes, like saving RDF datatypes when saving forms, RDF lists display, HTTP timeouts, multi-values in table cells, etc

Landing page: group user edits by RDF class ("paragraphs & history view")
FEATURE: Proxy for HTTP get; used for HTTP images that need to be HTTPS; same for dbPedia Lookup
FEATURE: Create Prefilled input Form, from the Referer URL,when user click on (+) button
FEATURE: IP Filter to blacklist unwanted web crawlers; for now hard coded IP

I18N : spanish, german

Blank Nodes as subject: implement in /download
/sparql-form , /display?displayuri=...&blanknode=true , download?url=_%3Abaaf... , /sparql-form?query=

/download : use prefixes actually used among the global SF Prefix Mapping
add new service /rdf2json?src=<URL>&frame=
Form <input> : paste text with new lines  creates new input fields in same order
dbpedia lookup: adapt to new API
add new service /json2rdf?src=<URL> (WIP)
Use new taxref HTTPS sparql server for taxon name completion
New client program: RDFuploader: loads given file in given graph;
contextual creation button (+) : clone (alias prefill) occurs only for (new) button on top of /display page
TOC generation (scrollnav)
FIX CSVImporter when cell contains a Turtle abbreviated URI
FIX /login : user ID was an URI, now a string,

Dependencies updates
Jena 3.17.0 , Titanium JSON-LD 1.0.0 ,
com.typesafe.play 2.8.5 , sbt.version=1.4.5 , Scala 2.12.12,
summernote 0.8.18

The zip distribution was updated for better logs and performance of /load-uri , if you want that more recent code, the tag is https://github.com/jmvanel/semantic_forms/releases/tag/2.6.0-log .