v3.2.0

• Add generator-style packing interfaces for MS3Record and MS3TraceList. Specifically these interfaces:
  • msr3_pack_init(), msr_pack_next(), msr_pack_free()
  • mstl3_pack_init(), mstl3_pack_next(), mstl_pack_free()
• Fix mstl3_pack_ppupdate_flushidle() logic to flush only idle streams.
• Fix memory leak in mseh_replace().
• Addition of a CMake build system contributed by @lsawade, thank you!