Alternative Hashing Dependency

[RyanJField]

Currently DigestCPP includes windows.h. This causes declaration issues including the enum declaration of ERROR for the logger and use of min max declarations in yamlcpp.

Currently these are mitigated using:

IF(WIN32)
    add_definitions(-DNOMINMAX)
    add_definitions(-DNOGDI)
ENDIF()

However it would be better to use a library that does not require windows.h for windows compilation.