Add a Way to Retrieve the Normalized Language Name

[jrg94]

We're really close to getting the original README code to work, but the only way I could do it was with the following line:

self.pages[language._name] = page

It would be nice if the user could retrieve the LanguageCollection._name field somehow. I was thinking a simple function like pathlike_name() which would indicate the purpose of retrieve the name C# as c-sharp.