Fixed indefinite article

Signed-off-by: Sam Kleinman <samk@10gen.com>
build: adding infrastructure for building and managing ref-toc content generation
minor: fixes for new ref-toc generation
build: changing toc_builder to use table_builder infrastructure
reorg: query operator index and reference
minor: edits to nearSphere

Signed-off-by: Sam Kleinman <samk@10gen.com>
update css

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-1441 move info from footnote to table in ensureIndex

Signed-off-by: Sam Kleinman <samk@10gen.com>
reorg: cursor methods ref toc