[FEAT] Diff of graph implemented. TODO: change colors in Graph Explorer. Instead of yellow -> red : blue -> red.

[OPTI] Subqueries are not optimized. Ok for local tests if you prefer the syntax but for production, only inner joins are accepted. Thanks.

FIX termtable sort vs filter problem + sort toggle is 2 ways (asc/desc) instead of 3 (asc/desc/neutral)

tidying all libs ('js' dir renamed to 'lib' because of new package-based hierarchy which mixes filetypes) and refs to them from the templates etc

Tidying annotations: moving all app's libs => to project static libs (no more npm/bower install, just static files now)

annotation side panel: show only the ngrams that where highlighted and not the entire active list(s)