Lower minimum tx fee in line with Bitcoin 0.9

Since Bitcoin Core 0.9 the minimum relay tx fee was lowered to `0.00001`.
Merge pull request #657 from drak/patch-1

Lower minimum tx fee in line with Bitcoin 0.9
Merge branch 'master' of git://github.com/spesmilo/electrum
json-friendly debug messages. fix #659
slightly better notifications. at least, it fixes #652
format inputs so that they fit on one line
fix #563
No longer require restart for toggle exchange rate

Fixes issue #643 and allows fiat button to work without restart

No logic is required because Send tab gets removed and added for every
toggle.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	lib/bitcoin.py
	plugins/aliases.py
update readme
relocate export_history code
handle coinbase transactions explicitly
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README
	gui/qt/lite_window.py
Exchange rate update

use exchange rate value instead of string to calculate balance
Merge pull request #665 from wozz/exchange-value

Exchange rate update
installwizard: multisig wallets
fix #655
Merge remote-tracking branch 'upstream/master'
abstract and improve seed and key methods
more robust get_seed_text