Add install instructions and small mad lib program

INSTALL.md

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+You can download the Go tools package installer or the archive from: https://golang.org/dl/
+
+If you download the archive:
+
+Extract into /usr/local
+
+Add Go PATH to your system profile:
+
+export PATH=$PATH:/usr/local/go/bin
+
+If you want to install the Go tools into a different location you can set a GOROOT env variable to point to that directory
+
+Add GOROOT to your .bash_profile or .profile:
+
+export GOROOT=$HOME/go
+export PATH=$PATH:$GOROOT/bin
+
+If you download the package installer:
+
+Open the installer and install the tools. 
+
+Mac OS X:
+
+The installer will install go to /usr/local/go and will put the directory (/usr/local/go/bin) into your PATH env variable.
+
+Test that you've installed Go correctly and run your first "Hello, Word." program:
+
+Create a new directory and set up a workspace:
+
+Set a GOPATH env variable in your .bash_profile or .profile: 
+
+$ export GOPATH=$HOME/workspace
+
+Create your first Go program:
+
+Make the directories src/github.com/(your github username)/hello inside your workspace directory.
+While inside the hello directory create a file named hello.go and add:
+
+package main
+
+import "fmt"
+
+func main() {
+    fmt.Printf("hello, world\n")
+}
+
+Compile your first Go program:
+
+$ go install github.com/(your github username)/hello
+
+Run your first Go program:
+
+After compiling the program an executable will be inside the bin directory of the workspace:
+$HOME/workspace/github.com/(your github username)/bin or $GOPATH/bin
+
+To run the program run:
+
+$ $GOPATH/bin/hello
+
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madlib.go

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+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Mad lib program!")
+	fmt.Println("Give me a noun!: ")
+	var noun string
+	var verb string
+	var adjective string
+	var noun2 string
+	fmt.Scanln(&noun)
+	fmt.Println("Give me a verb!: ")
+	fmt.Scanln(&verb)
+	fmt.Println("Give me an adjective!: ")
+	fmt.Scanln(&adjective)
+	fmt.Println("Give me another noun!: ")
+	fmt.Scanln(&noun2)
+
+	fmt.Println(fmt.Sprintf("The %v %v to the %v %v", noun, verb, adjective, noun2))
+}