v1.3.0 alpha

Major fixes:

• #20: Searching uses independent request for each search result section.
• #24: Clicking search input no longer closes search on some browsers.

Minor fixes:

• Escalate button no longer does anything if song is already next.
• #27: Date in activity list can no longer show "in a few seconds".

Features:

• Can limit number of song transcoding jobs happening at once.
• Can specify duration limit for songs to add.
• Some song-adding errors can be shown to user if "displaytext" is set.
• Server gracefully handles missing config values