Fixes #11 -- Split artist and title on first delimiter

[MarkWasley]

Split artist and title correctly when there are multiple delimiters. I have also added spaces around the delimiter to avoid splitting artists with hyphenated names in the wrong place.

Fixes issue:
#11

[BusterNeece]

@MarkWasley We shouldn't change the default argument for the delimiter on its own since it's used in the Shoutcast adapters as-is, without the spaces, due to some versions of Shoutcast sending artist/title combinations without the spaces. If you want to change the default parameter to what Icecast uses, that's fine but you should also change the Shoutcast adapters to explicitly specify the other delimiter format.

[MarkWasley]

@BusterNeece I'm pleased you've seen this. How do we fix this issue then? I didn't want to add the spaces, but in testing I discovered the function couldn't differentiate between the delimiter and hyphenated names. Look forward to your thoughts.