Fix a bug with images width and height display in pin_find
Fix a bug with scan of page with wrong encoding indications.
Fix line-height in pin_view pin description.
Add some links to navigate from pin to pin. Need to add previous and
next pin pk in view context.
Add prev and next links in pin_view, tests ok.
Fix bug that user get all bords in pin_create board select.
Fix a bug with urls longer than 200 char storage in db (with psql).
Fix a bug with pin upload and pin_create_tmp_resource session variable.