v0.0.2

• Added opt-in crate feature "binary-scaling" that replaces integer division with $2^{32}$ fixed-point binary scaling for all integer-based percentile queries (value_at_p90(), value_at_p95(), value_at_p99(), etc.), achieving a ~1.5x to 2x speedup with a small loss of accuracy;
• Added "null-feature" -- a no-op feature that has no effect but simplifies driver scripts that conditionally pass features;