Writing multiple binary files

[ephathaway]

Currently when adding a binary file to a Writer class object, it checks to see if there is already a .bin file added via a flag. If a binary file has already been added, it will throw an error when an attempt is made to add a second one. The difficult part will be figuring out how to name the .bin files correctly when writing them. They should be named signal1.bin, signal2.bin, etc. Each .bin file also needs a dataInfo file named info1.bin, info2.bin, etc.