Add/improve help for Debug + plugins from F-W:

- Debug
- Factoids
- Format
- Games
- Google
- Herald
- Internet
- Karma
- Lart
- Math
- Misc
- MoobotFactoids
- Network
- News
- NickAuth
- Nickometer
- Note
- Owner
- Protector
- Quote
- QuoteGrabs
- Relay
- Scheduler
- Seen
- ShrinkUrl
- Status
- String
- Time
- Todo
- Topic
- URL
- Unix
- User
- Utilities
- Web
Substitution string re-added to __init__Template
supybot-plugin-create: Added --desc short description option.
supybot-plugin-create: options.desc substitution for README.md
Anonymous: Better error when "tell" is disabled
Filter: fix a typo in 'aol' help
Update README.md for lilybot branch
INSTALL.md: proofread for grammar and formatting
INSTALL.md: more minor changes
Misc: fix a typo (s/uncompatible/incompatible/)
irclib: Tweak message queue priorities

- Move PRIVMSG and NOTICE from low to normal priority to eliminate
  on-connect lag
- Add CAP to high priority to match CAPAB
Misc: add ability to specify custom help URLs when 'help' is ran without arguments
Misc: further simplify custom help logic
Merge remote-tracking branch 'origin/misc/customhelp' into lilybot