don't run _collectionsExist command through mongos, it's not intended to work
Merge branch 'diverge'
skip bug301 in sharding_passthrough because it uses transactions
Merge branch 'diverge'
update NEWS
add NEWS for 1.0.2
Merge branch 'NEWS-1.0.2'

Conflicts:
	distsrc/NEWS
add note about #300
Merge branch 'NEWS-1.0.2'
Merge branch 'master' into loader