[Developers] html entity encoding

[David Flanagan]

brendan wrote:
> Yes the freebase mqlread service defaults to html escaping.  But,  
> metaweb.py on google code actually reverses that; if you call it's  
> mqlread method, it has it's own escape param and if you don't specify  
> an arg, it will assume you want "escape":null.  It's a little confusing.
> 
> Brendan

Are there any legal values for 'escape' other than 'html' and false?

Also, are there any other query parameters I don't know about?  Here are 
the ones I know of:

query:  the query itself
escape: we've just discussed this
cursor: for breaking a results into chunks
as_of_time: for historical queries

Anything else I need to document?

	David