refs #372 Use the new put multiple API - currently relies on remote
ft-index branch origin/26
refs #372 Use a hot indexer for background index builds and a cold
indexer for foreground index builds.
FIx error handling in the indexer, add nindexesbeingbuilt to stats and
use it in some tests
Merge branch 'putmultiple' of github.com:Tokutek/mongo into putmultiple

Conflicts:
	src/mongo/db/indexer.cpp
	src/mongo/db/storage/indexer.cpp