Slowpoke101/FTBLaunch — pull request #722 by jikuja (2014-05-06 20:46:33+00:00)
Title: ADDED: force update checks file integrity

If force update is enabled:
* AssetDownloader() compares existing assets' size and hash to
remotely reported size and hash. Comparing to locally saved hash
also work.
* gatherAssets() compares assest hashes to locally saved hashes if
possible. Otherwise asset is added into list and checked by
AssetDownloader().