changed psubs to new definitions
reindexed resource files
add split_utils module

functions to manage corpus splits
add iteration over fragments with corpus identifier
crash or truncate bad intervals
reindexed subsampling files
refactor tde/corpus.py

moved classes and functions in tde/corpus.py into their own submodule tde/data.
Each logical unit now is in a file of its own inside that module.
refactor tde/util

moved tde/reader.py tde/util.py tde/split_util.py into a common
submodule tde/util/. Split functionality from tde/util.py into
printing.py and functions.py.
refactor tde/substrings

moved tde/acss.py tde/ccss.pyx tde/levenshtein.pyx into a common
submodule tde/substrings/.
refactor tde/measures/

moved the measures tde/boundaries.py tde/group.py tde/match.py
tde/nlp.py tde/token_type.py into a common submodule tde/measures
updates tde/goldset.py

This module is not actually used anymore. Will be removed in the future.
removed a bunch of superfluous test files
updated top-level individual measures scripts
updated bin/english_eval2.py bin/sample_eval2.py
updated build scripts
updated .gitignore