tabs are initialized from TW.conf.relatedDocsAPIS keys and selected by db.json preference

cf. pull req https://github.com/thednp/bootstrap.native/pull/142

(cleanup sidebar code before adding new tabs for reldocs)

php requires less initial url parameters and reads every variable from db.json conf (values for columns to index and to search in, and the db table itself)... + documentation on the same ; NB: the only things that stayed hardcoded are the non-changing output tables from cortext-style dbs

factorize access to local static files and fix imagestar function, stash unused archeology of script variants for future decision to clean or integrate

cf. same for jsons in de6b4496

make noverlap account for new node sizes slider ; adjust legends after changetype ; etc

TW.ByType offers faster access to nodes by type + various clarifications with new typestring

towards a more transparent changeType structure and typestring syntax

use of edges(eid).hidden makes filters faster + rationalize function signatures + remove comments

also fixed an fa2 condition

for servermenu mode, let the nodetypes be stipulated by graph source