minor fixes for wallet creation
fix: show_private_key
minor fixes
fix: sign_message
fix: network start was calling __init__
connect to random servers, reconnect if connection is lost
pass network to NetworkDialog and Blockchain
fix: wallet.addresses
fixes, resend_subscriptions
get version asynchronously, for faster launch
Fix dumpprivkeys
Fix export private keys from GUI
Bugfix: Allow signing messages over 252 characters
Merge pull request #292 from ctrlcctrlv/master

Fix some bugs I found in 1.9
separate version_getter module
resolve merge conflict in gui_classic.py