add abc file, add tune_header, add test expectation for tune

.gitignore

@@ -35,4 +35,3 @@ build/
 .rvmrc
 
 #test files for parsing
-*.abc

lib/abc/tune.rb

@@ -1,8 +1,9 @@
 
 module ABC
   class Tune
+    attr_reader :header
     def initialize(tune)
-
+      @header = TuneHeader.new
     end
   end
 end

lib/abc/tune_header.rb

@@ -0,0 +1,6 @@
+
+module ABC
+  class TuneHeader
+
+  end
+end

lib/abc_parser.rb

@@ -1,4 +1,5 @@
 require 'pry'
 require 'abc/file'
 require 'abc/file_header'
-require 'abc/tune'
+require 'abc/tune'
+require 'abc/tune_header'

spec/abc/tune_spec.rb

@@ -24,7 +24,9 @@
 #
 describe ABC::Tune do
   let(:tune) {ABC::File.new("spec/fixtures/english.abc").tunes[0]}
-  it "should have a header"
+  it "should have a header" do
+    expect(tune.header)
+  end
   it "should have a body"
   it "should have a reference number of 1"
   it "should have the title 'Dusty Miller, The'"

spec/fixtures/english.abc

@@ -0,0 +1,56 @@
+%abc-2.1
+H:This file contains some example English tunes
+% note that the comments (like this one) are to highlight usages
+%  and would not normally be included in such detail
+O:England             % the origin of all tunes is England
+
+X:1                   % tune no 1
+T:Dusty Miller, The   % title
+T:Binny's Jig         % an alternative title
+C:Trad.               % traditional
+R:DH                  % double hornpipe
+M:3/4                 % meter
+K:G                   % key
+B>cd BAG|FA Ac BA|B>cd BAG|DG GB AG:|
+Bdd gfg|aA Ac BA|Bdd gfa|gG GB AG:|
+BG G/2G/2G BG|FA Ac BA|BG G/2G/2G BG|DG GB AG:|
+W:Hey, the dusty miller, and his dusty coat;
+W:He will win a shilling, or he spend a groat.
+W:Dusty was the coat, dusty was the colour;
+W:Dusty was the kiss, that I got frae the miller.
+
+X:2
+T:Old Sir Simon the King
+C:Trad.
+S:Offord MSS          % from Offord manuscript
+N:see also Playford   % reference note
+M:9/8
+R:SJ                  % slip jig
+N:originally in C     % transcription note
+K:G
+D|GFG GAG G2D|GFG GAG F2D|EFE EFE EFG|A2G F2E D2:|
+D|GAG GAB d2D|GAG GAB c2D|[1 EFE EFE EFG|A2G F2E D2:|\ % no line-break in score
+M:12/8                % change of meter
+[2 E2E EFE E2E EFG|\  % no line-break in score
+M:9/8                 % change of meter
+A2G F2E D2|]
+
+X:3
+T:William and Nancy
+T:New Mown Hay
+T:Legacy, The
+C:Trad.
+O:England; Gloucs; Bledington % place of origin
+B:Sussex Tune Book            % can be found in these books
+B:Mally's Cotswold Morris vol.1 2
+D:Morris On                   % can be heard on this record
+P:(AB)2(AC)2A                 % play the parts in this order
+M:6/8
+K:G                        
+[P:A] D|"G"G2G GBd|"C"e2e "G"dBG|"D7"A2d "G"BAG|"C"E2"D7"F "G"G2:|
+[P:B] d|"G"e2d B2d|"C"gfe "G"d2d| "G"e2d    B2d|"C"gfe    "D7"d2c|
+        "G"B2B Bcd|"C"e2e "G"dBG|"D7"A2d "G"BAG|"C"E2"D7"F "G"G2:|
+% changes of meter, using inline fields
+[T:Slows][M:4/4][L:1/4][P:C]"G"d2|"C"e2 "G"d2|B2 d2|"Em"gf "A7"e2|"D7"d2 "G"d2|\
+       "C"e2 "G"d2|[M:3/8][L:1/8] "G"B2 d |[M:6/8] "C"gfe "D7"d2c|
+        "G"B2B Bcd|"C"e2e "G"dBG|"D7"A2d "G"BAG|"C"E2"D7"F "G"G2:|