recognize Harbour sources

[Harbour language: https://github.com/harbour/core]

Reopened PR 593 with the two language additions split off.
Add r alias
fix refactoring from #836
Merge pull request #873 from github/debug

fix refactoring from #836
Initialize breakdown hash
2.10.9
Update prolog samples
Adding Perl heuristic (and fixing up Prolog)
travis/bundler fix
Nicer breakdown output
Added a C# console file and cshtml Razor MVC View file.
Added cshtml extention for C# ASP.Net MVC Views.
Updated sample.json to include C# samples
Corrected order of C# file extentions
Merge branch 'Csharp-samples' of https://github.com/emma-burrows/linguist into Csharp-samples
Merge pull request #877 from emma-burrows/Csharp-samples

Csharp samples, including ASP.Net MVC view file
Regenerate samples
updated Dart sample to align with best practices
Merge pull request #878 from kevmoo/master

updated Dart sample to align with best practices
Add Hy language.

Hy is a dialect of Lisp that’s embedded in Python.