Fix getbalance discrepency

Two changes:

Use IsConfirmed() instead of IsFinal(), so 'getbalance "*" 0' uses the same
'is this output spendable' criteria as 'getbalance'. Fixes issue #172.

And a tiny refactor to CWallet::GetBalance() (redundant call to IsFinal -- IsConfirmed
calls IsFinal).
getbalance with no arguments and 'getbalance "*" 0' could return different different results,
Bugfix: makefile.linux-mingw: Fix so passed CXXFLAGS/LDFLAGS work correctly
Bugfix: makefile.unix: Honour BOOST_LIB_SUFFIX on boost_unit_test_framework
add address and account information to listunspent
Also copy the address to the X11 clipboard (the one you middle-click to paste)
Some unit tests for CAlert
-alertnotify=<cmd>

Runs a shell command when an AppliesToMe() alert is received.
%s in the <cmd> string is replaced with the alert.strStatusBar
message.
translations update 2013-03-19 (bitcoinstrings.cpp / bitcoin_en.ts)
blockchain -> block chain (used everywhere else)
Adding 'copy txid' to qt tx overview context menu
Recommend alertnotify
2012 to 2013
Merge pull request #2400 from gladoscc/master

Update readme copyright 2012 to 2013
Minimal architectural changes necessary to support multiple wallets in bitcoin-qt
- This commit is a minimal restructuring necessary to support multiple wallets in the UI. Please see multiwallet-qt.txt for details.
Make MIN_TX_FEE match MIN_RELAY_TX_FEE.

Current relay behavior is widely deployed. Supplying a higher minfee than
mining and relaying just irritates users without anti-spam gain.
Fix transaction fee in uBTC

Step for buttons 'up' and 'down' - 0.001. With BTC and mBTC all ok, but
0.001 uBTC is lower than minimal value (satoshi)
User should press 10 times on 'up' button to get 0.01 uBTC
Save & restore window size and position
Show window in center of screen on first launch
Make explicitly requested salvage operations keep going when there is an error.

In my tests corrupted wallets would often result in BDB dropping an error
just due to duplicate records being found, which appears harmless.
(finally) Remove IRC Seed support now that lfnet is down.