Incorporated a part of exception_translator::operator() code into the state_machine class template. This simplifies custom exception translators and makes implementing them less error-prone

[SVN r27433]

libs/statechart

@@ -1 +1 @@
-Subproject commit 9ede431c0aa2a9cb5e4b0f0c0e79f4cb7ffc63aa
+Subproject commit 0f24387c86620d2563afdfa7366deccf511b275c