Copy edits for typos

Signed-off-by: Sam Kleinman <samk@10gen.com>
Update crud.txt

Corrected a typo

Signed-off-by: Sam Kleinman <samk@10gen.com>
Fix up some JS formatting

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2304 param table: fsync

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-2340: edits to fsync page