Update try_catch.h

Added 2 more exception codes:
* fileFormatException - thrown when crash dump doesn't match expected
                        format.
* stackOverflowException - thrown if CrashCatcher dump contains special
                           value at end of dump indicating that there
                           was a stack overflow when generating a dump.

Update __throw macro so that it can be used as single line statement.
Add exceptionPSR to RegisterContext

During a crash there are two PSR values of interest, the PSR of the
code which crashed and the PSR of the fault exception handler.  The
exception handler PSR value contains the IPSR, indicating which fault
was encountered.
Add CrashCatcherDump_ReadBinary() API

This function allows CrashDebug to read in binary crash dumps created
by CrashCatcher.