Replace .hgignore with .gitignore.

.gitignore

@@ -0,0 +1,24 @@
+# Binaries
+\.dll$
+\.exe$
+\.so$
+
+# Files generated by Visual Studio
+\.aps$
+\.ncb$
+\.sdf$
+\.suo$
+\.user$
+
+# Build directories
+/Debug.*
+/Release.*
+/JITDebug.*
+/JITRelease.*
+
+# Files generated by Mac OS X Finder
+(^|/)\.DS_Store$
+
+# Files generated by Windows Explorer
+(^|/)Desktop\.ini$
+(^|/)Thumbs\.db$