add ArchiveItAccwReader examples, implementation, and vcr cassette

Add ArchiveItAccw implementation.  Originally, I just used the
  entity['waybackCalendar'] attribute to populate the NYUCore identifier
  value.  This approach resulted in a "400 Bad Request' response from Fedora
  on resource loading.  The max Fedora pid length is 64 characters, however
  the waybackCalendar URLs are ~70 characters, not including the Fedora
  namespace prefix.  Therefore, I decided to generate an MD5 digest of the
  waybackURL and use that as the identifier.  An MD5 digest generates a
  fixed-length (32 character long) string, and the chance of a hash collision
  in the set of ArchiveIt Accw waybackCalendar URLs is small.
add ArchiveItAccw resource set
add scenario for Archive of Contemporary Composers' Websites
add "Archive of Contemporary Composers' Websites" collection

add scenario and ACCW collection.
add ArchiveItAccw search scenario
add archive_it_accw data load/delete capistrano tasks
add Fedora Identifier reference URL to comments
add example for Archive of Contemporary Composers' Websites

Add example to test for presence in Collection map.
Update collection title (add apostrophe after "Composers").
update scenario to match collection title
add ArchiveItAccwReader examples, implementation, and vcr cassette

Add ArchiveItAccw implementation.  Originally, I just used the
  entity['waybackCalendar'] attribute to populate the NYUCore identifier
  value.  This approach resulted in a "400 Bad Request' response from Fedora
  on resource loading.  The max Fedora pid length is 64 characters, however
  the waybackCalendar URLs are ~70 characters, not including the Fedora
  namespace prefix.  Therefore, I decided to generate an MD5 digest of the
  waybackURL and use that as the identifier.  An MD5 digest generates a
  fixed-length (32 character long) string, and the chance of a hash collision
  in the set of ArchiveIt Accw waybackCalendar URLs is small.
add ArchiveItAccw resource set
add scenario for Archive of Contemporary Composers' Websites
add "Archive of Contemporary Composers' Websites" collection

add scenario and ACCW collection.
add ArchiveItAccw search scenario
add archive_it_accw data load/delete capistrano tasks
add Fedora Identifier reference URL to comments
add example for Archive of Contemporary Composers' Websites

Add example to test for presence in Collection map.
Update collection title (add apostrophe after "Composers").
update scenario to match collection title
Merge branch 'ai-accw' of github.com:NYULibraries/ichabod into ai-accw

Conflicts:
	spec/models/nyucore/collections_spec.rb
Merge pull request #94 from NYULibraries/ai-accw

feature/"Archive of Contemporary Composers' Websites"