Installed versions are not always displayed in "correct order" with haxelib list

[Gama11]

This is a very minor issue, if it can be considered an issue at all. The versions installed don't always show in the "correct order" (oldest first, newest last). Like you can see on this screenshot, it seems to work perfectly for every lib but nape, where 2.0.9 shows up on the very right instead of on the left:

[drkibitz]

I haven't looked at the code, but looks like a pretty standard sort issue, 1 comes before 9.

[onefifth]

These are currently displayed in whatever order they are handed to Haxelib from the filesystem. So ordered alphabetically rather than as actual numbered versions. Which unfortunately means 10 comes before 2.
This particular issue will be much more easily fixed with the upcoming changes to the library version handling/parsing in pull #81.

[nadako]

I went ahead and added version sorting using current SemVer.compare