Resolve ambiguities at fetch and select specific metadata columns

This micro-release includes additions that allow for the resolution of ambiguities at data and metadata retrieval through two different means. The first is to retain the sample with the most sequence data, the second is to merge ambiguous samples together.

This release also includes a bug fix where periods were not being escaped, and in some extreme examples getting interpreted by webdis as denoting an altered return type over the default of JSON.

Finally, we now also allow for the retrieval of specific metadata columns!