4.0.0

• Changed license from LGPL to Apache 2.
• Renamed public macros and "keywords".
• Extracted multithreading support to a separate library
  exceptions4c-pthreads.
• Extracted lightweight version to a separate library
  exceptions4c-lite.
• Removed non-essential public functions and typedefs.
• Removed built-in exceptions and signal handling.
• Removed support for legacy compilers.

Added

• Type e4c_exception_type
• Type e4c_debug_info
• Type e4c_exception
• Type e4c_context
• Macro EXCEPTIONS4C
• Macro TRY
• Macro CATCH
• Macro CATCH_ALL
• Macro FINALLY
• Macro THROW
• Macro RETRY
• Macro USING
• Macro WITH
• Macro USE
• Macro REACQUIRE
• Function e4c_set_context_supplier
• Function e4c_get_context
• Function e4c_get_exception
• Function e4c_is_uncaught