consistent naming of input files

[cambro]

do not add app-specific names/prefixes to input file names. For example

Not:

pollen_diagram_nlp352

But:

sentences_nlp352

[iross]

Fixed over in https://github.com/UW-Deepdive-Infrastructure/dd-infrastructure/commit/270d1364dec4cea58cde6ac837aec65cf05468d3