unindexed center uses same math funcs as indexed.  expand tests
2d not suitable for within: geometry queries, more tests
add comments to some jstests
expand geo_s2nearComplex
SERVER-939 Made is*Set methods const
SERVER-939 Change FIELD_VALID to FIELD_SET
SERVER-939 Made source argument of parseBSON const ref
SERVER-939 Removed unused default parameter from extract function
SERVER-8254: load new js helpers from spidermonkey
SERVER-8117: listDatabases - config/admin db should come from config servers