implementing mksendmanytx

A simple argument parsing change from mktx to allow passing multiple recipients
implementing paytomany (untested)

Just like mktx/payto, this is only submitting the tx created in mksendmanytx
split seed words with newline too
Updated label help text
fix: assert fails on startup
Slightly modifying help output for clarity
Merge pull request #206 from JulianTosh/TuxHelpMods

Slightly modifying help output for clarity
fix: socket error
handle errno 10035
fix: print_log -> print_error
distinction between unconfirmed and unverified transactions
icon cannot be None
use an Event to signal when to redraw the gui
move network dialog in a new class; simplify interface.get_servers
fix servers script
fix update_password: save use_encryption after seed
handle exceptions returned by update_password
restore display of blockchain height in network dialog
update / merge authors from webpage
move verify_message to wallet