Initial rename of Panther ot SyncStorage
Continuing rename
Renaming continued
Renaming continued
Fix tests
Rename panther in services and configuration to sync_storage
Fix documentation
Fix phpcs warnings
Fix phpcs error
Sync storage storage of storage to store storage
Manage StoreManager
Renamed AbstractImportSourceEvent to AbstractImportSourceEventListener
Merge pull request #52 from trylika/master

Rename Panther to SyncStorage
Renamed Listener classes and moved to corresponding directories.
Merge remote-tracking branch 'upstream/master' into sync-import-command
Renamed SyncStorage usages.