Unicode support setting

reference from https://github.com/msysgit/msysgit/wiki/Git-for-Windows-Unicode-Support

Author: shiena

src/GitHub.Api/Git/Tasks/GitCommitTask.cs

@@ -15,7 +15,7 @@ public GitCommitTask(string message, string body,
             Guard.ArgumentNotNullOrWhiteSpace(message, "message");
 
             Name = TaskName;
-            arguments = "commit ";
+            arguments = "-c i18n.commitencoding=utf8 commit ";
             arguments += String.Format(" -m \"{0}\"", message);
             if (!String.IsNullOrEmpty(body))
                 arguments += String.Format(" -m \"{0}\"", body);

src/GitHub.Api/Git/Tasks/GitLogTask.cs

@@ -15,7 +15,7 @@ public GitLogTask(IGitObjectFactory gitObjectFactory,
 
         public override string ProcessArguments
         {
-            get { return @"log --pretty=format:""%H%n%P%n%aN%n%aE%n%aI%n%cN%n%cE%n%cI%n%B---GHUBODYEND---"" --name-status"; }
+            get { return @"-c i18n.logoutputencoding=utf8 -c core.quotepath=false log --pretty=format:""%H%n%P%n%aN%n%aE%n%aI%n%cN%n%cE%n%cI%n%B---GHUBODYEND---"" --name-status"; }
         }
     }
 }

src/GitHub.Api/Git/Tasks/GitStatusTask.cs

@@ -15,7 +15,7 @@ public GitStatusTask(IGitObjectFactory gitObjectFactory,
 
         public override string ProcessArguments
         {
-            get { return "status -b -u --ignored --porcelain"; }
+            get { return "-c i18n.logoutputencoding=utf8 -c core.quotepath=false status -b -u --ignored --porcelain"; }
         }
         public override TaskAffinity Affinity { get { return TaskAffinity.Exclusive; } }
     }