Make denoise_wrapper work again after using the fancy existing_filepaths option parser, which broke the code.
Use 'existing_filepaths' option in denoiser.py
Make split mode work with multiple sff.txt files coming from the existing_filepaths option
fix erroneous typo from last commit
Merge branch 'master' of github.com:qiime/qiime into fix_denoiser_sff_file_lists
Pass list of files instead of file to fast_denoiser() in test
fix code according to comments by @josenava
Merge pull request #1096 from jensreeder/fix_denoiser_sff_file_lists

Fix denoiser sff file lists