Add some warnings about resource usage and backup archives.
removeMetadata -> removeMetadataID.
Drop a superfluous comment.
Clean up newStorageID.
Clean up addStorageMetadata.
UpdateFromMetadata -> newStorageMetaDoc.
Update the package doc comment.
fileSet -> isFileInfoComplete.
doc.asMetadata -> docAsMetadata.
Fix a doc comment.
Fix a doc comment.
Use errors.Trace.
gc.IsNil -> jc.IsNil.
Give a little more explanation about the backups package.
Be a bit more careful about stored timestamps.
Add more info to a comment.
txnOp -> txnOpBase.
*DBConnInfo -> DBConnInfo.
Actions API :: Don't use names.Tag over the wire

 - Tags on the wire should be strings, per fwereade
Move charm archive logic to API server

The client no longer determines the charm archive URL
from the current API server address, but instead queries
the API server for a list of URLs to attempt. The uniter
will try each URL until one works.

Fixes https://bugs.launchpad.net/juju-core/+bug/1394976