comments for sighash script stuff
remove redundant chain reference in leveldb_organizer (only base organizer needs it)
update last checkpoint to block 278700
set checkpoint to 702
bump version number to 2.0
downgrade scary looking error to warning.
downgrade error to warning (thanks Noel Maersk): http://lists.dyne.org/lurker/message/20140113.093843.531c548b.en.html
remove get_data from session: already implemented in getx_responder.
enable compressed keys, and remove redundant/obsolete set_private_key()/private_key() methods for elliptic_curve_key.
Merge remote-tracking branch 'origin/master'