Vendor psutils and remove neko

plugins/system/ps/load/load_windows.go

@@ -0,0 +1,13 @@
+// +build windows
+
+package load
+
+import (
+	common "github.com/shirou/gopsutil/common"
+)
+
+func LoadAvg() (*LoadAvgStat, error) {
+	ret := LoadAvgStat{}
+
+	return &ret, common.NotImplementedError
+}