textrecipes 0.0.2

• Custom stemming function can now be used in step_stem using the custom_stemmer argument.
• step_textfeatures() have been added, allows for multiple numerical features to be pulled from text.
• step_sequence_onehot() have been added, allows for one hot encoding of sequences of fixed width.
• step_word2vec() have been added, calculates word2vec dimensions.
• step_tokenmerge() have been added, combines multiple list columns into one list-columns.
• step_texthash() now correctly accepts signed argument.
• Documentation have been improved to showcase the importance of filtering tokens before applying step_tf() and step_tfidf().