Coin Control for Litecoin

https://github.com/bitcoin/bitcoin/pull/2343
Coin Control is now very close to merge ready for Bitcoin 0.9.

https://github.com/litecoin-project/litecoin/commits/exp-0.8.5.1-cc2
This Pull Request contains a Bitcoin 0.8.5. backport by cozz which improves the user experience and un-hardcodes the priority thresholds in a way that should be compatible with Litecoin's 4x higher priority.  He later fixed a time zone display issue in the input selection dialog, which I pulled into our own branch.  I excluded the other parts that reflect the new fee behavior introduced in 0.9.

**Risk Assessment**
https://github.com/litecoin-project/litecoin/commits/exp-0.8.5.1-cc
The previous version of Coin Control for Litecoin shipped in an optional side build from 0.8.3.x through 0.8.5.1-OMG2.   It has operated without any reported problems for the past few months.  So it was likely ready for mainline Litecoin inclusion a while ago, but we kept it in side builds primarily because it was still undergoing polishing in the upstream ticket.  That appears to be nearly done now with further 0.9-specific changes, so it might be time to merge in Litecoin 0.8 soon.  We only need to be sure the new priority handling that changed between ```exp-0.8.5.1-cc``` and ```exp-0.8.5.1-cc2``` is working properly by the test plan.

**Test Plan**
Combine lots of p2pool dust to ensure that 67 inputs of sufficient coin age combine with zero fee and successfully are included in a block by a miner.  Many iterations of this must be tested to be sure that no CC transactions ever become stuck.  Dust of sufficient age where they are right on the edge of old enough to qualify for "free" would be ideal for this kind of test.

**Changelog**
* Upgrade from Coin Control 0.8.3 to 0.8.5 (October 5th, 2013).
* Fix time zone display for inputs in the Coin Control selection dialog.
* Display the correct fee including the per output sub-CENT dust penalty.