Release v0.9.91

Hey everyone, just a new release with the following changes being primary:

• Removed store and storeu functions from being class-contained to free-standing.
• Removed unnecessary branch statements from serialize_impl functions.
• Improved some of the preprocessor macros for setting architecture.
• Replaced a function that uses intrinsics with a non-intrinsic (but more rapid) version.
• Renamed parsestring to parseString,.
• Fixed a heap-buffer-overflow issue on two of the comparison functions.
• Added more implementation to the raw_json_data class.
• Added a dedicated concepts namespace.
• Added some string-to-number functions.
• Split the parseNumber function into multiple specializations to improve performance.
• Refactored the jsonifier_object_t and jsonifier_array_t related functions.
• Refactored the AVX-types into a statically-operating class instead of a containing one, to improve performance.
• Renamed a bunch of things.
• Added the structural_index_vector and buffer_string classes for parsing performance.
• Improved error output - for debugging the indices.
• Implemented new serialization logic for strings.
• New subtraction logic.
• Reorganized some of the headers.