We decided that better name for "scope" will be "access". This change
refactors cmd part of code but don't touch libuplink. For backward
compatibility old configs with "scope" field will be loaded without any
issue. Old flag "scope" won't be supported directly from command line.
https://storjlabs.atlassian.net/browse/V3-3488
Change-Id: I349d6971c798380d147937c91e887edb5e9ae4aa
Moving lib/uplink actually makes implementing the new library harder.
Move the package back where it was.
Change-Id: If758e897e3e56155a48ae82b23904cd8cdd72c13