Search results should indicate which schema is used to store the metadata

[horsburgh]

From the functional specifications: Each search result should have an icon indicating which schemas are used to store the metadata. The purpose of this is to provide some explanation of the type of data (and or other content) that a search result contains.

[pkdash]

@horsburgh and @Maurier Currently all metadata is stored using only one generic schema. Once we support file type schemas as per the issue #105 (WIP PR: #116), we can tag the search results with schema type.