Update Document

Updated the design document some more.
Update to the PC App

[CSVFileParser.cs]
* Updated the parsing methods to account for how the SongData class
stores note data now.

[Form1.cs]
* Rearranged local variables for organizational purposes
* Created a new method that OpenFile calls to sort through the file
names, call the appropriate parser, and add it to the MusicSynchronizer
data list

[MusicSynchronizer.cs]
* Changed how SongData stores data. It now has a list of lists to
determine the measure's timing. This is similar to how other music
simulators do this.

[comHandler.cs]
* Rearranged IDs to how they are defined now.