[Ironruby-core] [Code Review] SP1 check should show the correct language name

[Jimmy Schementi]

http://github.com/jschementi/ironruby/commit/f615c36390b7af9d1479c4f54d74927eacbd45d4

Currently running ir.exe when the .NET framework is not installed prompts the user with the error message "IronPython requires .NET ..." This moves the check to where the display name of the console's language is known. Does anything that runs before it depend on something post 2.0 SP1 but pre 3.5 SP1 so it would blow up before hitting this check? If so, is there a better way to get the language's name, maybe from the assembly name?

http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=1899.