Swap 'title' and 'releaseTitle' meaning

- Trasparent change: now it makes more sense.
- Updated tests to reflect 'title', 'releaseTitle' meaning swap.
- Improved documentation.

Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>

whipper/command/cd.py

@@ -56,7 +56,8 @@ disc and track template are:
  - %S: release sort name
  - %B: release barcode
  - %C: release catalog number
- - %d: disc title
+ - %d: release title (with disambiguation)
+ - %D: disc title (without disambiguation)
  - %y: release year
  - %r: release type, lowercase
  - %R: release type, normal case
@@ -187,7 +188,7 @@ class _CD(BaseCommand):
             and self.program.metadata.artist \
             or 'Unknown Artist'
         self.program.result.title = self.program.metadata \
-            and self.program.metadata.title \
+            and self.program.metadata.releaseTitle \
             or 'Unknown Title'
         _, self.program.result.vendor, self.program.result.model, \
             self.program.result.release = \

whipper/command/mblookup.py

@@ -26,7 +26,7 @@ Example Disc ID: KnpGsLhvH.lPrNc1PBL21lb9Bg4-"""
         :type md: `DiscMetadata`
         """
         print('    Artist: %s' % md.artist.encode('utf-8'))
-        print('    Title:  %s' % md.title.encode('utf-8'))
+        print('    Title:  %s' % md.releaseTitle.encode('utf-8'))
         print('    Type:   %s' % str(md.releaseType).encode('utf-8'))
         print('    URL:    %s' % md.url)
         print('    Tracks: %d' % len(md.tracks))