Add options and logging in extract_dependency
Make category target as option
Move read deps/words to util.py
Add default option for opt-field
Move out lexicon construction module
Add extract_metadata.py: to process file names to get docIDs
Add category in extract_metadata and corpus_root in config
Remove redundant opt-fields
Remove extract metadata part
Rename lexicon_construction --> build_lexicon
Change logging string
Add module wrap
Add color import
Move old scoring function to dev
Last exp mode
Output IDF dictionary
Merge branch 'dev'