features
* helper methods to create integer lists (1179)
* default of `--benchmark_filter` is now <empty> rather than "." (1207)
fixes
* type warning (1193)
* returning a reference when callers want pointers (65dc63b)
cleanup
* remove dead code from `PredictNumItersNeeded` (1206)
* fix clang-tidy warnings (1195) and typos (1194)
* prefix macros (1186) and flags (1187, 1185) to avoid name clashes
* downgrade warnings for googletest (twice) (1203, 560b0834, ee726a7)