picobench 2.00

• Breaking change! runner::run_benchmarks doesn't return a report anymore. The report is generated by runner::generate_report instead
• Breaking change! report_output_format doesn't accept output streams as arguments. Use set_output_streams.
• Potentially breaking change (non windows builds)! Always set thread affinity to first core. Requires -lpthread. Macro to turn this off.
• Added runner::run which performs a full execution
• Added benchmark results and results comparison
• Added error enum
• Macro option to allow a std::function as a benchmark
• Macros for default iterations and samples
• Allowing local registration of benchmarks in a runner
• Added local_runner which doesn't consume registry
• More force-inline functions in states
• Fixed some potential compilation warnings
• Removed tests from header
• Anonymous namespace for impl-only classes and funcs
• Added setters and getters for every config option