Aka: Fix typo and help for 'show'

Help for 'aka show' should now mentions the --channel argument (this
was implemented but not mentioned).
QuoteGrabs: Prevent quote grabs from queries.
Merge pull request #951 from GLolol/aka-1

Aka: Fix typo and help for 'show'
Seen: insert a witty message when calling seen/any on the bot
Network: add 'networks --all' option
Merge pull request #956 from GLolol/network/networks-all

Network: add a 'networks --all' option
Seen: fix for tests
Merge pull request #957 from GLolol/seen/self-nick

Seen: insert a specific message when calling seen/any on the bot