Compiler instrumentation + Fortran module + New tool libraries + NCCL support + NVML support + Python tracing + Hatchet + User Metadata + CUPTI PCSampling

• Numerous stability fixes
• Fortran module
• Compiler instrumentation
• NCCL support
• timemory-mallocp
• timemory-ncclp
• timemory-nvml
• Python line-by-line tracing
• I/O {read,write}_{char,bytes}
• Network stats components
• libunwind support
• CMake minimum upgraded to 3.15
• Type-traits for tree/flat/timeline
• Hierarchical serialization (hatchet support)
• Concepts
• Improved settings
• Python tracer (line-by-line)
• CTestNotes support
• Command-line options for settings
• Migrated cereal to internal (i.e. cereal:: -> tim::cereal::)
• Dramatically improved Windows support
• Improved kokkos support
  • Command-line options
  • Print help
• XML serialization support
• Shared caches for components
• Support for C++17 string_view
• Python bindings to storage classes
• Windows support for different CPU timers
• CUDA Cupti PCSampling support (CUDA v11+)
• User metadata
• Sampling support in opaque (i.e. within user-bundles)
• Static polymorphic base for bundlers
• Namespace re-organization
• CUDA compilation with Clang compiler
• Piecewise installation
• timem support md5sum hashing of command-line
• papi_threading setting
• is_invalid in base_state
• New operations
  • stack_push
  • stack_pop
  • insert
  • set_depth_change
  • set_is_flat
  • set_is_on_stack
  • set_is_invalid
  • set_iterator
  • get_is_flat
  • get_is_invalid
  • get_is_on_stack
  • get_depth
  • get_storage
  • get_iterator