Project restructure (#18)

* First pass at restructuring the project; untested but it does compile

* Restructure builds and runs 🎉

* Add the dist folder to the gitignore

* Update core/playlist/monitor.go

* golint and reorganize the monitor.go file

Co-authored-by: Gabe Kangas <gabek@real-ity.com>

core/constants.go

@@ -0,0 +1,20 @@
+package core
+
+import (
+	"fmt"
+)
+
+// the following are injected at build-time
+var (
+	//GitCommit is the commit which this version of owncast is running
+	GitCommit = "unknown"
+	//BuildVersion is the version
+	BuildVersion = "0.0.0"
+	//BuildType is the type of build
+	BuildType = "localdev"
+)
+
+//GetVersion gets the version string
+func GetVersion() string {
+	return fmt.Sprintf("Owncast v%s-%s (%s)", BuildVersion, BuildType, GitCommit)
+}