RF: fix up structure and docs
RF: fix typo, added test for create_tightclust
TEST: added new test for calc_tightclusters
TEST: added tests for skm_permute and skm_cluster
NF: added code to find best weight cutoff by finding elbow in curve, and related tests
RF+TEST:add parse_clusters, pull functionality out of calc_cutoffs, handle more than two clusters, add tests
DOC: added sparcl_setup.rst
RF: move calc_pos_neg to own function, added tests
NF: added gitignore
TEST: added test for predict_clust, added catch for cutoffs of non-Series type, fix doc
NF: added tets, set commandline interface default to weightsum=None, small cleanup
RF: change names to follow pep8
Merge pull request #4 from cindeem/final_edits

Final edits