Small syntax fix of JS commands

Signed-off-by: Sam Kleinman <samk@10gen.com>
separate procedure to enable balancer

Signed-off-by: Sam Kleinman <samk@10gen.com>
change sharding example to use a better shard key

Signed-off-by: Sam Kleinman <samk@10gen.com>
DOCS-94 DOCS-95 DOCS-1407 migrate sharded cluster to new hardware