xdg-Open does not work on MAC

[mattions]

And we need to find a cross-platform way to do it.

This is the error from @tclose

WARNING neuronvisio.controls 457 Could not locate a predefined 
mosinit.hoc. Can't automatically load the model. Check the 
README for hints on which hoc to use and copy it to 
Models/144054/mosinit.hoc 
INFO neuronvisio.modeldb.ModelDB 99 Opening 'Models/144054'. 
--------------------------------------------------------------------------- 
OSError Traceback (most recent call last) 
/usr/local/lib/python2.7/site-packages/neuronvisio/controls.pyc in 
load_selected_model(self) 
457 logger.warning(path_info) 
458 self.ui.statusbar.showMessage(path_info, 10000) 
--> 459 mod.browse() 
460 
461 def make_animation_screenshots(self, time_start, time_stop=None, 

/usr/local/lib/python2.7/site-packages/neuronvisio/modeldb/ModelDB.pyc in 
browse(self) 
98 modelName = self.get_name() 
99 logger.info("Opening '" + self.get_dir()+"'.") 
--> 100 self._start_file(self.get_dir()) 
101 else: 
102 logger.info("Model does not exists locally") 

/usr/local/lib/python2.7/site-packages/neuronvisio/modeldb/ModelDB.pyc in 
_start_file(self, filename) 
250 except: 
251 # Implementation for Linux 
--> 252 subprocess.Popen(['xdg-open', filename]) 
253 
254 

[mattions]

It seems there is an open command for MAC that we may can use

[mattions]

Ops, wrong number in the commit.