Add cross compile back to Makefile.

.travis.yml

@@ -6,7 +6,7 @@ services:
 language: go
 
 go:
-  - 1.6
+  - 1.7
 
 os:
   - linux

Makefile

@@ -45,3 +45,19 @@ before-build:
 # Collects all dependencies and then calls update
 .PHONY: collect
 collect:
+
+.PHONY: cross
+cross:
+	test -d dist || mkdir dist
+	echo "Building Windows 32-bit..."
+	env GOOS=windows GOARCH=386 go build -o dist/pingbeat-windows-32.exe
+	echo "Building Windows 64-bit..."
+	env GOOS=windows GOARCH=amd64 go build -o dist/pingbeat-windows-64.exe
+	echo "Building Linux 32-bit..."
+	env GOOS=linux GOARCH=386 go build -o dist/pingbeat-linux-32.exe
+	echo "Building Linux 64-bit..."
+	env GOOS=linux GOARCH=amd64 go build -o dist/pingbeat-linux-64.exe
+	echo "Building OSX 32-bit..."
+	env GOOS=darwin GOARCH=386 go build -o dist/pingbeat-darwin-32.exe
+	echo "Building OSX 64-bit..."
+	env GOOS=darwin GOARCH=amd64 go build -o dist/pingbeat-darwin-64.exe