Send Stop and Play clock events on seek.
Send Stop and Play clock events on seek.

Fixes #37

joshuabrown-ellation/libjass,Dador/libjass,joshuabrown-ellation/libjass,Dador/libjass,Arnavion/libjass,joshuabrown-ellation/libjass,Dador/libjass,Arnavion/libjass,Arnavion/libjass