decompose_path now returns a data frame
decompose path now deals with empty input
added test for zero length input
decompose_path returns character columns, not factors; is consistent with class
recompose_path has safety coersion of extension column to character
decompose_path's row names work again with missing values
fixed test for general path decomposition
fixed test for decompose_path empty input
removed dupe test
fixed test for decompose_path with factor input
added Janko to the DESCRIPTION
Merge branch 'master' of github.com:richierocks/pathological