fixes #29 -- ia download fails with 404 when file name has '%'. Cleaned up docstrings.
fixes #29 -- ia download fails with 404 when file name has '%'. Cleaned up docstrings.

jjjake/internetarchive,JesseWeinstein/internetarchive,dattasaurabh82/internetarchive,brycedrennan/internetarchive,wumpus/internetarchive