Topik

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* Refactor with aim towards modularity at each step
* add elasticsearch input source
* add elasticsearch as output backend option
* add initial PLSA model algorithm
* expand documentation; add examples of using Topik with Python API
* add API docs from docstrings
* add continuous integration with Travis CI
* add code coverage monitoring with Coveralls
* add code analysis with Scrutinizer
* replace R-LDAvis with PyLDAvis to eliminate R dependency for simplicity
* multitudinous bug fixes guided by Travis + doctests

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* initial release
* primarily CLI-driven front-end to LDA and R-LDAvis
* termite plots with Bokeh
* support for JSON, folder, and solr input sources