Bitcoin客户端0.7.2版本发布

改版本修复了一些BUG：
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* Prevent RPC 'move' from deadlocking. This was caused by trying to lock the
  database twice.

防止RPC 'move'命令吊死

* Fix use-after-free problems in initialization and shutdown, the latter of
  which caused Bitcoin-Qt to crash on Windows when exiting.
修复了客户端初始化和关闭在windows崩溃的问题。
* Correct library linking so building on Windows natively works.、
修正了windows下库连接

* Avoid a race condition and out-of-bounds read in block creation/mining code.
防止建立区块代码时发生紊乱的一个错误

* Improve platform compatibility quirks, including fix for 100% CPU utilization
  on FreeBSD 9.

增强兼容性，修复了在FreeBSD 9上面CPU占用率100%的问题

* A few minor corrections to error handling, and updated translations.
一些小的错误修正，更新的一些语言的译文。

* OSX 10.5 supported again
再次支持OSX 10.5(责任编辑：nightcat)