Adding go modules and removing vendor and dep (#9)

go.mod

@@ -0,0 +1,28 @@
+module github.com/topfreegames/pitaya-cli
+
+go 1.13
+
+require (
+	github.com/abiosoft/ishell v2.0.0+incompatible // indirect
+	github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db // indirect
+	github.com/chzyer/logex v1.1.10 // indirect
+	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
+	github.com/fatih/color v1.7.0 // indirect
+	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
+	github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce // indirect
+	github.com/magiconair/properties v1.8.0 // indirect
+	github.com/mattn/go-colorable v0.0.9 // indirect
+	github.com/mattn/go-isatty v0.0.3 // indirect
+	github.com/mitchellh/go-homedir v0.0.0-20180801233206-58046073cbff
+	github.com/mitchellh/mapstructure v0.0.0-20180715050151-f15292f7a699 // indirect
+	github.com/nats-io/go-nats v1.5.0 // indirect
+	github.com/pelletier/go-toml v1.2.0 // indirect
+	github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910 // indirect
+	github.com/prometheus/common v0.0.0-20180801064454-c7de2306084e // indirect
+	github.com/prometheus/procfs v0.0.0-20180725123919-05ee40e3a273 // indirect
+	github.com/sirupsen/logrus v1.0.6
+	github.com/spf13/afero v1.1.1 // indirect
+	github.com/spf13/pflag v1.0.1 // indirect
+	github.com/topfreegames/pitaya v0.16.0
+	gopkg.in/abiosoft/ishell.v2 v2.0.0
+)