Add ICU to the libraries downloaded by the dependencies fetcher

aegisub/build/BuildTasks/DependencyFetchers.fs

@@ -108,9 +108,6 @@ type TarballProject() =
       with | :? IO.IOException -> true
 
     let update directory (project : ITaskItem) version =
-      let dirname url =
-        Uri(url).Segments.Last().Replace(".tar.gz", "")
-
       try IO.Directory.Delete(directory, true) with | :? IO.IOException -> ()
 
       this.Log.LogMessage ("Downloading {0} {1} from {2}", project.ItemSpec, version, project.GetMetadata "Url")
@@ -121,7 +118,9 @@ type TarballProject() =
       use tarArchive = ICSharpCode.SharpZipLib.Tar.TarArchive.CreateInputTarArchive tarStream
 
       sprintf @"%s\.." directory |> tarArchive.ExtractContents
-      IO.Directory.Move(project.GetMetadata "Url" |> dirname |> sprintf @"%s\..\%s" directory, directory)
+      let dirname = project.GetMetadata "DirName"
+      if not <| String.IsNullOrWhiteSpace dirname
+      then IO.Directory.Move(dirname |> sprintf @"%s\..\%s" directory, directory)
 
       IO.File.WriteAllText(sprintf @"%s\version.aegisub" directory, version)
 

aegisub/build/deps/deps.vcxproj

@@ -47,10 +47,16 @@ Aegisub Project http://www.aegisub.org/
     <TarballProject Include="fftw">
       <Version>3.3.2</Version>
       <Url>http://www.fftw.org/fftw-3.3.2.tar.gz</Url>
+      <DirName>fftw-3.3.2</DirName>
     </TarballProject>
     <TarballProject Include="boost">
       <Version>1.52.0</Version>
       <Url>http://downloads.sourceforge.net/project/boost/boost/1.52.0/boost_1_52_0.tar.gz</Url>
+      <DirName>boost_1_52_0</DirName>
+    </TarballProject>
+    <TarballProject Include="icu">
+      <Version>50.1.1</Version>
+      <Url>http://download.icu-project.org/files/icu4c/50.1.1/icu4c-50_1_1-src.tgz</Url>
     </TarballProject>
   </ItemGroup>