* Updates package description to note that blockchain now takes
2+ GB instead of 150+ MB.
* Stop creating DB_CONFIG with DB_LOG_AUTO_REMOVE as that is set
in Bitcoin itself now.
* Update changelog with 0.6.2 and the current updates.
- icon from the LGPL Nuvola set (like the tick) - http://www.icon-king.com/projects/nuvola/
- include 'boost/version.hpp' in db.cpp so that the overwrite version of copy can be used
- catch exceptions in BackupWallet (e.g. filesystem_error thrown when trying to overwrite without the overwrite flag set)
- include db.h in walletmodel.cpp for BackupWallet function
- updated doc/assets-attribution.txt and contrib/debian/copyright with copyright info for new icon