support multi-module (#4)

* add multimodule
* re-package modules

model/report/science.go

@@ -0,0 +1,14 @@
+package report
+
+type Science struct {
+	Name    string `json:"name"`
+	Drive   Float  `json:"drive"`
+	Weapons Float  `json:"weapons"`
+	Shields Float  `json:"shields"`
+	Cargo   Float  `json:"cargo"`
+}
+
+type OtherScience struct {
+	Race string `json:"race"`
+	Science
+}