Sort the output of installed versions using new semver library. Fixes #262.

build.bat

@@ -4,7 +4,7 @@ SET ORIG=%CD%
 REM SET GOPATH=%CD%\src
 SET GOBIN=%CD%\bin
 SET GOARCH=386
-SET version=1.1.5
+SET version=1.1.6
 
 REM Get the version number from the setup file
 REM for /f "tokens=*" %%i in ('findstr /n . %INNOSETUP% ^| findstr ^4:#define') do set L=%%i

nvm.iss

 #define MyAppName "NVM for Windows"
 #define MyAppShortName "nvm"
 #define MyAppLCShortName "nvm"
-#define MyAppVersion "1.1.5"
+#define MyAppVersion "1.1.6"
 #define MyAppPublisher "Ecor Ventures LLC"
 #define MyAppURL "http://github.com/coreybutler/nvm"
 #define MyAppExeName "nvm.exe"

src/nvm.go

@@ -17,7 +17,7 @@ import (
 )
 
 const (
-  NvmVersion = "1.1.5"
+  NvmVersion = "1.1.6"
 )
 
 type Environment struct {
@@ -446,6 +446,7 @@ func list(listtype string) {
     inuse, a := node.GetCurrentVersion()
 
     v := node.GetInstalled(env.root)
+
     for i := 0; i < len(v); i++ {
       version := v[i]
       isnode, _ := regexp.MatchString("v",version)

src/nvm/node/node.go

@@ -80,28 +80,56 @@ func IsVersionAvailable(v string) bool {
   return false
 }
 
+func reverseStringArray(str []string) []string {
+	for i := 0; i < len(str)/2; i++ {
+		j := len(str) - i - 1
+		str[i], str[j] = str[j], str[i]
+	}
+
+	return str
+}
+
 func GetInstalled(root string) []string {
-  list := make([]string,0)
+  list := make([]semver.Version,0)
   files, _ := ioutil.ReadDir(root)
+
   for i := len(files) - 1; i >= 0; i-- {
     if files[i].IsDir() {
       isnode, _ := regexp.MatchString("v",files[i].Name())
+
       if isnode {
-        list = append(list,files[i].Name())
+        currentVersionString := strings.Replace(files[i].Name(), "v", "", 1)
+        currentVersion, _ := semver.Make(currentVersionString)
+
+        list = append(list, currentVersion)
       }
     }
   }
-  return list
+
+  semver.Sort(list)
+
+  loggableList := make([]string,0)
+
+  for _, version := range list {
+    loggableList = append(loggableList, "v" + version.String())
+  }
+
+  loggableList = reverseStringArray(loggableList)
+
+  return loggableList
 }
 
 // Sorting
 type BySemanticVersion []string
+
 func (s BySemanticVersion) Len() int {
     return len(s)
 }
+
 func (s BySemanticVersion) Swap(i, j int) {
     s[i], s[j] = s[j], s[i]
 }
+
 func (s BySemanticVersion) Less(i, j int) bool {
   v1, _ := semver.Make(s[i])
   v2, _ := semver.Make(s[j])