Added nuget target to Makefile which in theory should work however th…

…ere is a bug in mono that breaks nuget pack so until it's relsolved I can't build nuget packages without the Microsoft version of the .net Framework. Here's a bug report already filed with Xamarin:

https://bugzilla.xamarin.com/show_bug.cgi?id=17430

Makefile

@@ -2,12 +2,16 @@ BUILD = xbuild
 RELEASEDIR = Releases
 RELEASE = System.Net.FtpClient.$(shell date +%y.%m.%d)
 RELEASEPATH = $(RELEASEDIR)/$(RELEASE)
+SNK = $(HOME)/Dropbox/Documents/System.Net.FtpClient-SNK/System.Net.FtpClient.snk
 
 all: debug
 
 release:
 	$(BUILD) /p:Configuration=Release System.Net.FtpClient/System.Net.FtpClient.csproj
 
+release-signed: 
+	$(BUILD) /p:Configuration=Release /p:SignAssembly=true /p:AssemblyOriginatorKeyFile="$(SNK)" System.Net.FtpClient/System.Net.FtpClient.csproj
+
 debug:
 	$(BUILD) /p:Configuration=Debug System.Net.FtpClient/System.Net.FtpClient.csproj
 
@@ -22,9 +26,9 @@ clean:
 	rm -rf System.Net.FtpClient/obj
 	rm -rf Tests/bin
 	rm -rf Tests/obj
-	rm -rf $(RELEASEDIR)
+	rm -rf $(RELEASEPATH)
 
-codeplex: release debug
+codeplex: clean release debug
 	rm -rf $(RELEASEPATH)
 	mkdir -p $(RELEASEPATH)
 	mkdir -p $(RELEASEPATH)/bin
@@ -37,4 +41,8 @@ codeplex: release debug
 	cd $(RELEASEDIR); zip -r $(RELEASE).zip $(RELEASE)/
 	rm -rf $(RELEASEPATH)
 
+nuget: clean release-signed
+	nuget pack System.Net.FtpClient/System.Net.FtpClient.csproj -Prop Configuration=Release -OutputDirectory $(RELEASEDIR)
+
+
 packages: codeplex