Expyriment 0.6.4 released!

[Florian Krause]

Expyriment 0.6.4 has just been released! This is a bugfix release, please update.

New Features:
- log levels can be changed while running experiment via the method 
  Experiment.set_logging. Access current  via Experiment.loglevel
- Modification the logging of individual objects while runtime. Most classes 
  have now the method set_logging(onoff), to switch on or off the logging. 
- design.randomize.rand_element returns a random element from a list
- blocks and trails have the property 'factor_dict', which is a dictionary with
  with all factors
- experimental Android support

Fixed:
- incorrect background colour for TextInput
- Font in TextScreen
- several fixed in documentation
- switching off logging via "expyriment.control.defaults.event_logging = 0" not 
  now working
- "numpy version bug" in data.preprocessing
- unicode bug for picture, audio and video filenames
- polling of parallel port
- io.TextMenu font was hardcoded

You can download the new version from http://www.expyriment.org/getit