Tags can now be added to a batch of files
LaputinAPI no longer tries to invoke callback when linking tag to file if no callback was provided
Improved UI for batch operations
Implemented batch deletion of a tag
Batch operations is an optional view on files page
Newly created tag is added to .tags so that it can be used in autocompletions
Tag filtering is now immediately applied after adding or removing tags
New tags can now be created in batch operation