Update to pallet 0.8.0-RC.7
Improve maintenance of replica set members

When nodes are added or removed, this should be reflected in the replica
set configuration.
Add support for mongo MMS agent install
Updated metadata for 0.8.0-alpha.2
Updated project.clj, release notes and readme for 0.8.0-alpha.2
Merge branch 'release/0.8.0-alpha.2' into develop
Update pallet-codox dependency
Updated version for next release cycle
Merge remote-tracking branch 'upstream/develop' into develop