App update

Submodule web/app 42cc95b..1a8f586:
  > Rename the ltype to latent_type
  > Rename lid to latent_id
  > Rename tid to tenprint_id
  > Rename upload_id to submission_id
  > Rename all variables reserved by python, remove unused variables
  > Only copy to PiAnoS the configured accounts
  > Add the sql_insert_generate() function and replace all INSERT sql queries