We can now write V2 PIC/APIC Frame

Signed-off-by: Akintayo Abiona Olusegun <akintayo.segun@gmail.com>
Properly read idv1 tags

Signed-off-by: Akintayo Abiona Olusegun <akintayo.segun@gmail.com>
We can now write Text Frames.
We must call set_file before we start writing frames.

Signed-off-by: Akintayo Abiona Olusegun <akintayo.segun@gmail.com>
Sync should be cast
When syncing, writing all new frames, then write existing frames (that
		are not new, then write mp3data

Signed-off-by: Akintayo Abiona Olusegun <akintayo.segun@gmail.com>