better handling of very small fiat numbers and mBTC
Merge pull request #2 from dpdtex/temp1

better handling of very small fiat numbers and mBTC
fixed issue when exchange rate not available (eg, no connection)
Merge pull request #3 from dpdtex/temp1

fixed issue when exchange rate not available (eg, no connection)
show exchange rate in status panel - for example, "1 BTC~735.24 USD"
added space
added space