Add status header and finalize README for v1.0.0

Merge v9-dd-for-double: dd-based range reduction for sin/cos

Document v9: dd-based range reduction for sin/cos

Add dd-based range reduction for sin/cos

Document v9: dd-based range reduction for sin/cos

Add dd-based range reduction for sin/cos

Update README for v8: ABI workarounds, 64-bit ULP table

Port to ARM64 and Apple Silicon

Merge v8-arm-port: ARM64 and Apple Silicon support

Port to ARM64 and Apple Silicon

Port to ARM64 and Apple Silicon

Apply clang-format to test.c

Document benchmark results in README

Merge v7-benchmark: performance measurements

Add benchmark: 10^6 calls per function vs libm

Add benchmark: 10^6 calls per function vs libm

Merge branch 'v6-ulp-report'

Document ULP metric in README

Merge v6-ulp-report: ULP deviation table

Add ULP deviation table to precision comparison

Document ULP metric in README

Add ULP deviation table to precision comparison