Implements search functionality and prepares for upcoming paging in v0.3.

API/Services/MetadataService.cs

@@ -52,6 +52,8 @@ namespace API.Services
 
        public void UpdateMetadata(Series series, bool forceUpdate)
        {
+          // TODO: this doesn't actually invoke finding a new cover. Also all these should be groupped ideally so we limit
+          // disk I/O to one method.
           if (series == null) return;
           if (ShouldFindCoverImage(series.CoverImage, forceUpdate))
           {