Download libsodium releases from github, not libsodium.org
Merge pull request #154 from graydon/libsodium-from-github

Download libsodium releases from github, not libsodium.org

Reviewed-by: MonsieurNicolas
Move LedgerConsensus::applyTransaction{,s} to static functions.
Add new LEDGER_JSON_BULK Json mode.
Pass optional close time when starting fresh history.
Add ripple_app/main/LedgerDump.{cpp,h}
Wire LedgerDump functions into main / command line processing.
Ledger 113 inflates, w/fee=10; return to charging fee.
Ledger 4251 closed at 00:19:21 w/sLCF_NoConsensusTime, need to propagate.
Ledger 19205 makes a trustline with asymmetric metadata.
Ledger 78742 applies txs in non-standard order in later phases.
Ledger 80960 uses lsfPasswordSpent.
Ledger 81011 uses lsfDisableMaster.
Ledger 87668 has a very large and malformed path that is only judged "dry".
Ledger 87668 has a same-currency offer.