Moved js source files to src folder

package.json

src/config.js

src/display/display.css

src/display/display.js

src/display/graph.js

src/display/helpers.js

src/display/overlays/filteroverlay.js

src/display/overlays/neighbors.js

src/display/overlays/nodeinfo.js

src/editor/css/editor.css

src/editor/editor.php

src/editor/images/onerror.png

src/editor/images/tools/addnode.png

src/editor/images/tools/collect.png

src/editor/images/tools/connect.png

src/editor/images/tools/delete.png

src/editor/images/tools/redo.png

src/editor/images/tools/save.png

src/editor/images/tools/select.png

src/editor/images/tools/settings.png