Expyriment 0.4.0 released!

[Florian Krause]

A new version of Expyriment has just been released!

Version 0.4.0 (22 Nov 2011)
---------------------------
New Features:
- saving and loading designs, new functions in experiment class (save_design 
  and load_design)
- new module: expyriment.misc.data_preprocessing with functions for data 
  handling and a new tool to preprocess and aggregate expyriment data 
  (class Aggregator). Note: Preliminary version. Use with caution.
- new extra stimulus class: visual mask  (depends on PIL)
- new extra io class: Webcam (depends in PIL and OpenCV)
- new extra io class: MidiIn
- new extra io class: MidiOut
- the repository and the expyriment source code zip file contain examples
- 'setup.py install' removes old installation  
- new function: block.save_trials
Changed:
- Extra modules are now hidden
- skipped function experiment.save_trial_list (please use the new 
  experiment.save_design instead)
- rename property block.all_factors_as_text --> block.factors_as_text 
- rename property experiment.trials_as_text --> experiment.design_as_text
- rename experiment.bws_factor_permutation_randomize --> 
  experiment.bws_factor_randomized
- Factor conditions/levels have to be a number (int, float) or a string. No 
  other data types are allowed.
Fixed:
- Bug in testing function of visual extra stimuli
- Bug fix, unbalanced between subject factor permutation for hierarchical 
  designs by subject_ID 
- Bug fix, playing short tones (duration<1 sec.) 

Download: http://code.google.com/p/expyriment/downloads/