Percentage based on last-known snapshot size
* server: exposed last completed snapshot size in the API
* cli: added support for progress indicator (percentage based on last-known snapshot size)
* htmlui: added progress indicator in the UI (percentage based on last-known snapshot size)
CreateSnapshotSource API for ensuring source exists
Upload - starts upload on a given source or matching sources
Cancel - cancels upload on a given source or matching sources
/api/v1/repo/create
/api/v1/repo/connect
/api/v1/repo/disconnect
Refactored server code and fixed a number of outstanding robustness
issues. Tweaked the API responses a bit to make more sense when consumed
by the UI.
Also introduced strongly typed content.ID and manifest.ID (instead of string)
This aligns identifiers across all layers of repository:
blob.ID
content.ID
object.ID
manifest.ID
