saveToFile() not implemented correctly for python regions

[Zbysekz]

See comments
#873 (comment)

Probably needs just create bindings for enum.
Now can be bypassed by using save() and saving as binary stream, like:

with open(filepath+"_basal.dump", "wb") as f:
            f.write(self._tm.basalConnections.save())

[dkeeney]

Thanks for posting this for me.

[dkeeney]

Corrected with PR #966

for saveToFile( ) and loadFromFile( ) the arguments are filename and fmt
fmt is optional and defaults to "BINARY". The fmt argument is a string and can be one of

• "BINARY" - fastest but not readable.
• "PORTABLE" - a little slower than "BINARY" but handles big/little endings when going between machines.
• "JSON" - a JSON text serialization that is mostly readable.
• "XML" - an XML text serialization that is mostly readable.

Note: in C++ the fmt argument can now be either a std::string or the enum as previously defined (see Serialization.hpp).