converted to Python 3.3 syntax
refactored code to use constants
removed duplicate file
converted test to Python 3.3 syntax
formatted into test cases using unittest
removed old test file
set up seq_error unit test
refactored utilities
fixed use of index constants in test_family, ignored .pyc files
formatted docstrings to be consistent
moved dirichlet_multinomial to utilities, refactored seq_error
moved sum_exp to utilities
refactored test_soma_muta
refactored test_germ_muta
set up trio_prob and its test
changed trio_model to reflect mutation prob formula in paper, need to be implemented
removed pdf import statements, updated setup file
rescaled matrices in log e space to normal
changed seq_error to accept one individual read
modified seq_error to use numpy array