reorg: moving sql chart to crud reference
Explain how mongos handles query options other than sort()

Gathered from a discussion with Richard and some code-reading.

Signed-off-by: Sam Kleinman <samk@10gen.com>
edits on cursor modifier handling.
Improve section about query modifiers a little more.

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor: removing redundant build targets
theme: moving to specific manual theme