chunk indexer class logic worked in creating chunks
refined idr duration calculation. changed it to pts based
bug fix in segmenter code
playlist type change
IndexBase class is introduced to take care of same api in playlist interface
wip
live playlist support kinda in there

host of changes done
segmenter, playlist support for checking and removing nodes.
index in segmenter are operated on IndexBase
fix for issue8 - add_node and remove_node can be clubbed together in all playlist
double dispatch pattern used in delivering index to corresponding handlers in different playlist