make /otr-info and /otr-start print same info

note: before this change, if eve used a key which alice had verified as bob's,
/otr-start would tell alice what was happening but /otr-info would say eve's
identity was verified!
Merge pull request #28 from leif/otrinfo

make /otr-info and /otr-start print same info
Add --online option to /roster command.

/roster --online will show only the contacts who are online.

Fixes #33.
Print [--flag] instead of <argname> for optinal arguments in /help.
Merge pull request #36 from schulze/master

Print [--flag] instead of <argname> for optinal arguments in /help.
Handle SMPFailed case.

This change causes a message to be printed in the event that an SMP
verification fails.

Fixes #37.
go fmt
new config item: IdleSecondsBeforeNotification