moved new nigh_level functions to separate branch
old code removed, build without local mongodb enabled
splitting up mongo.R file (> 1000 lines of code )-: )
mongo err ot own file
JSON queries directly enabled, mongo.is.connected check added to all functions
new parameters for mongo_index_create
new parameter GRIDFILE_DEFAULT for gridfs_*
change bson_empty to bson_shared_empty
changing bson_empty to bson_shared_empty
bugfixes for empty bson
drop test dbs after tests
fix test cleanup process
fix doucmentation for mongo.get.err.
introducing mongo.findOne
mongo.findOne as alias for mongo.find.one introduced
return to inefficient rbind for now
more test for find
more JSON tests
small test bugfix
remove connection checks from error checks