Misc Bug Fixes, Code Cleanup

Fixed bugs with getting timestamps multiple times in a row, cleaned up
all extraneous console.log and alert statements in the code, added new
alert statements if something went wrong
Documentation Added, Bug Fix for YouTube

Documentation has now been added, YouTube now works with CS50 2X enabled
(so when CS50 2X is run, YouTube can now be changed to the correct time
via pressing the "Resume Playback at Timestamp" button.
Added icon

Harvard shield with a notepad superimposed on it. With 128x128 pixels
(required size) my bad artwork isn't noticeable!
Documentation in Wrong Directory

Moved documentation to get-flash folder instead of New folder
All Icons Enabled

All icons, of sizes 16, 32, 48, 64, 128, 19, and 38, are enabled. Also,
directory structure modified appropriately.
Merge remote-tracking branch 'origin/pause-video'