processing core replaced with class instance (instead of multiple namespaces).
chrono: TSC rate determination improved.
core and message_queue internal stats fixup (correct tags initialization).
config: 'metrics' section removed (now 'gauge', 'counter', 'timer' sections are at top level).
config: pattern statistics configuration added (pattern is similar to bash wildcard pattern).
examples: example configs updated.
statistics: 'rate' statistic removed.
statistics: 'throughput' and 'frequency' statistics added.
config: configuration exception handling improved.

If during applying of the configuration error occurred HANDY_CONFIG_JSON/HANDY_CONFIG_FILE method returns false and resets configuration to defaults.
HANDY_CONFIG_ERROR() method added that returns a textual representation of the error if any.
chrono: CLOCK_MONOTONIC_RAW clock source for internal clock added.
config: global objects must be initialized before corresponding initializing functions are called.