Added PHP script filter which provides better performance for the wl command than can be achieved with AppleScript. See notes in the documentation; this is likely not a permanent solution. Closes #19, also fixes #21.
Fixed PHP exception when settings.plist does not yet exist.
Activate Wunderlist when it is on a different desktop rather than assigning it to all desktops to avoid user confusion. This switches the current desktop which causes Alfred to disappear, but it should only happen once if at all. If Wunderlist is not on the screen to update the list info, the wl command will use outdated list info from the cache. Fixes #23.
If the task contained a colon but did not match a list, make sure that the part preceding the colon is not removed. Fixes #21.