Allow globbing syntax for Data.remove().

[dotsdl]

Since datasets are stored in a directory structure, and since their names reflect this, it would be fairly easy to make deletions using globbing. This would be a great convenience when some datasets matching a pattern should be removed without removing others.

Moved from datreant/datreant#8

[dotsdl]

Perhaps not necessary given #7, and using this in combination with data.remove.