Builder manager bugfixes (#367)

This contains a few different builder manager fixes:

* Update the zip file structure to avoid an extra subdirectory
* Annotate packages with what functions are using them
* Only trigger builds when there is no deployment archive
* Python environment loadpath bugfixes
* Other bugfixes

buildermgr/envwatcher.go

@@ -269,22 +269,32 @@ func (envw *environmentWatcher) createBuilder(env *crd.Environment) (*builderInf
 	if err != nil {
 		return nil, err
 	}
+	// there should be only one service in svcList
 	if len(svcList) == 0 {
 		svc, err = envw.createBuilderService(env)
 		if err != nil {
 			return nil, fmt.Errorf("Error creating builder service: %v", err)
 		}
+	} else if len(svcList) == 1 {
+		svc = &svcList[0]
+	} else {
+		return nil, fmt.Errorf("Found more than one builder service for environment %v", env.Metadata.Name)
 	}
 
 	deployList, err := envw.getBuilderDeploymentList(sel)
 	if err != nil {
 		return nil, err
 	}
+	// there should be only one deploy in deployList
 	if len(deployList) == 0 {
 		deploy, err = envw.createBuilderDeployment(env)
 		if err != nil {
 			return nil, fmt.Errorf("Error creating builder deployment: %v", err)
 		}
+	} else if len(deployList) == 1 {
+		deploy = &deployList[0]
+	} else {
+		return nil, fmt.Errorf("Found more than one builder deployment for environment %v", env.Metadata.Name)
 	}
 
 	return &builderInfo{