add config and app skeleton

app/app.go

@@ -0,0 +1,20 @@
+package app
+
+import "github.com/ubclaunchpad/cumulus/conf"
+
+var (
+	config *conf.Config
+	// TODO peer store once it's merged in
+)
+
+// Run sets up and starts a new Cumulus node with the
+// given configuration.
+func Run(c conf.Config) {
+	config = &c
+	// Create peer store
+	// Open listening port
+	// If target specified, try to open connection
+
+	// Ask target for its peers
+	// Connect to these peers until we have enough peers
+}

conf/config.go

@@ -0,0 +1,17 @@
+package conf
+
+// Config contains all configuration options for a node.
+type Config struct {
+	// The interface to listen on for new connections.
+	Interface string
+	// The port to listen on for new connections.
+	Port uint16
+	// The address of the ingress node we should use to connect
+	// to the network.
+	Target string
+
+	// Whether or not to enable verbose logging.
+	Verbose bool
+	// Whether or not to participate in mining new blocks.
+	Mine bool
+}