Implements Client-Side RowKey translation on import

[yuce]

• ~Requires Pilosa compiled from: https://github.com/pilosa/pilosa/pull/1751~
• Currently works for RowKeyColumnID type data
• It works on roaring import.
• It works on CSV import. Temporarily disabled that though, since it requires ignoreKeyCheck flag; unconditionally enabling it breaks some tests, so need to look into that.
• Although not enabled currently, it should be easy to implement it for RowIDColumnKey and RowKeyColumnKey type data.
• Value fields are not supported yet, but should be trivial to implement.

[coveralls]

Coverage decreased (-1.1%) to 98.621% when pulling 7e16d5dbe66dc20e385093ee93a75d3c70a1c0d6 on yuce:row-keys-to-id-mapper into 4f922fff245e2e04b7336e0e9f61e879cd7907c7 on pilosa:master.

[coveralls]

Coverage decreased (-1.2%) to 98.077% when pulling 55649f62951aa1c5e3c009ff799c80112a4e6abf on yuce:row-keys-to-id-mapper into 3aaa2055d47979f8534271b85bad3268d0f51bf4 on pilosa:master.