added imgur + some cleanup

common.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"html/template"
+)
+
+var (
+	debugMode bool = true
+	funcs     = template.FuncMap{
+		"sub": func(a, b int) int {
+			return a - b
+		},
+		"add": func(a, b int) int {
+			return a + b
+		},
+	}
+)
+
+func max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}