The grand language renaming bonanza (#3278)

* Removing FORTRAN samples because OS X case-insensitive filesystems :-\

* Adding Fotran samples back

* FORTRAN -> Fortran

* Groff -> Roff

* GAS -> Unix Assembly

* Cucumber -> Gherkin

* Nimrod -> Nim

* Ragel in Ruby Host -> Ragel

* Jade -> Pug

* VimL -> Vim script

samples/Ragel/simple_scanner.rl

@@ -0,0 +1,69 @@
+=begin
+%%{
+  machine simple_scanner;
+
+  action Emit {
+    emit data[(ts+8)..(te-7)].pack('c*')
+  }
+
+  foo = 'STARTFOO' any+ :>> 'ENDFOO';
+  
+  main := |*
+    foo => Emit;
+    any;
+  *|;
+}%%
+=end
+
+
+# Scans a file for "STARTFOO[...]ENDFOO" blocks and outputs their contents.
+#
+# ENV['CHUNK_SIZE'] determines how much of the file to read in at a time, allowing you to control memory usage.
+#
+# Uses ragel's scanner functionality even though it's not strictly necessary.
+class SimpleScanner
+  attr_reader :path
+
+  def initialize(path)
+    @path = path
+    %% write data;
+    # % (this fixes syntax highlighting)
+  end
+
+  def emit(foo)
+    $stdout.puts foo
+  end
+  
+  def perform
+    # So that ragel doesn't try to get it from data.length
+    pe = :ignored
+    eof = :ignored
+
+    %% write init;
+    # % (this fixes syntax highlighting)
+
+    leftover = []
+    
+    File.open(path) do |f|
+      while chunk = f.read(ENV['CHUNK_SIZE'].to_i)
+        data = leftover + chunk.unpack('c*')
+        p ||= 0
+        pe = data.length
+
+        %% write exec;
+        # % (this fixes syntax highlighting)
+        if ts
+          leftover = data[ts..pe]
+          p = p - ts
+          ts = 0
+        else
+          leftover = []
+          p = 0
+        end
+      end
+    end
+  end
+end
+
+s = SimpleScanner.new ARGV[0]
+s.perform