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

I also edited some READMEs as I went along for grammar, since I based off some of the plugin help from them. Affected plugins (ref #903):
- sandbox/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