Added ArchiveAVFile method to AV Manager & created RecordedAV folder

Also changed the naming convention of the final recorded file. It is
now startTime_endTime.mpeg
added mute buttons

yay!
icons updated
Holy
Merge branch 'dev_gui' of github.com:AustinHeerwagen/SMU_SoftEng_AVStream into dev_gui
Merge pull request #20 from AustinHeerwagen/dev_gui

OMG