fix mul syntax
DOCS-2151 fix syntax for sparse index
DOCS-1837: Document mergeChunks

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1837: adding redirects
DOCS-1837: edits
Minor typo fix

Signed-off-by: Sam Kleinman <samk@10gen.com>
minor,build: removing singlehtml postprocessing from builder
DOCS-1980, DOCS-1934, DOCS-1935, DOCS-1936: new user and role features