* [DOWNLOAD_LOD,SC] Partitioned the LOD download process into:
  (1) A module that downloads a single URL.
  (2) A module that coordinates the downloading of URLs.
  (3) A module that does the same as (2), but multithreaded (TBD).
  (4) A module with generic support predicates for (1)-(3).
* [DOWNLOAD_LOD,NEW] Allow URLs to be dynamically added to the LOD basket.
* [LWM,NEW] Added HTTP response handler for POST requests for adding URLs.