Change default log file path.
Change default log file path.

It is now ~/Library/Application Support/com.tlphn.Telephone/Telephone.log.

Closes #48.

mobdim/Telephone,einfallstoll/Telephone,inz/Telephone,mralexgray/SwitchBoard,martinkero/Telephone,nriley/Telephone,thierryc/Telephone,thinkski/Telephone