added go mod files

go.mod

+module github.com/StephenMichaelis/pixel
+
+go 1.12
+
+require (
+	github.com/faiface/glhf v0.0.0-20181018222622-82a6317ac380
+	github.com/faiface/mainthread v0.0.0-20171120011319-8b78f0a41ae3
+	github.com/faiface/pixel v0.8.0
+	github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2 // indirect
+	github.com/go-gl/glfw v0.0.0-20181213070059-819e8ce5125f
+	github.com/go-gl/mathgl v0.0.0-20180804195959-cdf14b6b8f8a
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
+	github.com/pkg/errors v0.8.1
+	golang.org/x/image v0.0.0-20190118043309-183bebdce1b2
+)

go.sum

+github.com/faiface/glhf v0.0.0-20181018222622-82a6317ac380 h1:FvZ0mIGh6b3kOITxUnxS3tLZMh7yEoHo75v3/AgUqg0=
+github.com/faiface/glhf v0.0.0-20181018222622-82a6317ac380/go.mod h1:zqnPFFIuYFFxl7uH2gYByJwIVKG7fRqlqQCbzAnHs9g=
+github.com/faiface/mainthread v0.0.0-20171120011319-8b78f0a41ae3 h1:baVdMKlASEHrj19iqjARrPbaRisD7EuZEVJj6ZMLl1Q=
+github.com/faiface/mainthread v0.0.0-20171120011319-8b78f0a41ae3/go.mod h1:VEPNJUlxl5KdWjDvz6Q1l+rJlxF2i6xqDeGuGAxa87M=
+github.com/faiface/pixel v0.8.0 h1:phOHW6ixfMAKRamjnvhI6FFI2VRyPEq7+LmmkDGXB/4=
+github.com/faiface/pixel v0.8.0/go.mod h1:CEUU/s9E82Kqp01Boj1O67KnBskqiLghANqvUJGgDAM=
+github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2 h1:78Hza2KHn2PX1jdydQnffaU2A/xM0g3Nx1xmMdep9Gk=
+github.com/go-gl/gl v0.0.0-20181026044259-55b76b7df9d2/go.mod h1:482civXOzJJCPzJ4ZOX/pwvXBWSnzD4OKMdH4ClKGbk=
+github.com/go-gl/glfw v0.0.0-20181213070059-819e8ce5125f h1:7MsFMbSn8Lcw0blK4+NEOf8DuHoOBDhJsHz04yh13pM=
+github.com/go-gl/glfw v0.0.0-20181213070059-819e8ce5125f/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/mathgl v0.0.0-20180804195959-cdf14b6b8f8a h1:2n5w2v3knlspzjJWyQPC0j88Mwvq0SZV0Jdws34GJwc=
+github.com/go-gl/mathgl v0.0.0-20180804195959-cdf14b6b8f8a/go.mod h1:dvrdneKbyWbK2skTda0nM4B9zSlS2GZSnjX7itr/skQ=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
+github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0/go.mod h1:E/TSTwGwJL78qG/PmXZO1EjYhfJinVAhrmmHX6Z8B9k=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+golang.org/x/image v0.0.0-20190118043309-183bebdce1b2 h1:FNSSV4jv1PrPsiM2iKGpqLPPgYACqh9Muav7Pollk1k=
+golang.org/x/image v0.0.0-20190118043309-183bebdce1b2/go.mod h1:ux5Hcp/YLpHSI86hEcLt0YII63i6oz57MZXIpbrjZUs=