Add allow_spaces option allowing spaces in tokens.
Add allow_spaces option allowing spaces in tokens.

The default is set according to presence of spaces in training tokens.

ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe,ufal/udpipe