Handle odd bin/cue setups

[sselph]

Need to add a check in cues for bins with the same base name as well as removing the case sensitivity in the check.

[willfarrell]

Example:

Chrono Cross (Disk 1).bin
Chrono Cross (Disk 1).cue
Chrono Cross (Disk 2).bin
Chrono Cross (Disk 2).cue
Chrono Cross.m3u