Joshua Harlow fd1d81a90c Add base exception class for this library
To make it easier for users of this library to
differentiate general exceptions from automaton
exceptions it is quite common to have a root exception
class that libraries use (and derive there exceptions
from); this adds that.

Change-Id: I140cb188f58849ac5caea97ed5a422375b549f6f
2015-06-23 12:36:17 -07:00
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