M3u8

- Add support for double quote in resolution attributes
- Fix how segment represent itself (**str**)
- Bump version up

- add support for multiple bitrates 4
- translate relative path to absolute 5
- support for EXT-X-CUE-OUT-CONT tags as attributes of Segment
- support for EXT-X-INDEPENDENT-SEGMENTS
- add strict mode
- added AVERAGE-BANDWIDTH
- lots of bug-fixes and minor improvements

THANKS A LOT Neon-Dlea , mvmocanu , GrumpyOldTroll , cristina0botez and many others :clap:

- Updated to be EXT-X-CUE-OUT-CONT instead of EXT-X-CUE-OUT
- Updated model, protocol and parser to add cue_out info to Segment object
- Fix for https://github.com/globocom/m3u8/issues/43, Media (EXT-X-MEDIA) base uri handling.
- Fix for https://github.com/globocom/m3u8/issues/45, KEYFORMAT addition to EXT-X-KEY

Adds MANIFEST.in

- Add support to multiple keys
- Add a segment attribute to indicate if it has a discontinuity
- Adds program date time for each segment
- Program id and bandwidth are integers