Update 10gen package name

The modern 10gen dists of mongodb use teh 'mongodb-org' package names: http://downloads-distro.mongodb.org/repo/ubuntu-upstart/dists/dist/10gen/binary-amd64/

This is also what the Ubuntu installation guide suggests: http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/
follow up to #287
allow install_method to be mongodb-org (tests for #287)
deprecate 10gen_repo for mongodb_org_repo
support syslog: allow logpath to be nil fix, #288
update change log
10gen_repo recipe is deprecated
more 10gen -> mongodb-org stuff
drop freebsd templates
removed bogus fail
0.16.1 release
Tried to update the project to get the replicasets working on Amazon OpsWorks and to support the latest version of MongoDB on Ubuntu.