master
Got rid of the old style std/ includes for several files, mostly in map/ and platform/.
[base] [coding] Moved file_name_utils.{c,h}pp from coding/ to base/.
[geometry] Get rid of MercatorBounds, refactor to namespace mercator
[ugc] Check UGC ratings in constructor.
[ugc][statistics] check for zombie reviews
[indexer] Get rid of template GetValue
[indexer] DataSource refactoring
Review fixes
[omim] Replaced boost::optional with std::optional.
[ugc] Fix UGC_IndexMigrationFromV0ToV1Smoke test.
[ugc] GCC 6.1 build fix.
Review fixes.