Add a `Dirty` boolean to the `ContainerBase` class. This will be set to
true when the container mutates itself (e.g. remove, mergeBack, clear).
The dirty bit is reset when running `PipelineManager.store`.
Implement the pruning of container caches (resume directory) when there
is a mismatch between the current revng components' hash and the saved
one. This functionality is activated via `-check-components-version`.
This commit changes the following method names across the codebase:
* `storeToDisk` -> `store`
* `loadFromDisk` -> `load`
This has been done since the storage is no longer bound to the local
storage.
Add additional field MIMEType to Container.
This allows API consumers to know at runtime how to treat the data
within a container without any prior knowledge.
Giacomo Vercesi