Forcing ':' on standard tags

[ost12666]

To fix issues: https://github.com/videojs/m3u8-parser/issues/22

Forcing parser to recognize standard tags only when they end with ':'. This will prevent detecting, by mistake, tags that start with the same string.

[gkatsev]

@ost12666 is this still needed?

[ost12666]

I don't know I switched to https://github.com/kuu/hls-parser

[Essk]

See #156 - brings these changes into the present-day base