(bug 56334) Namespace l10n for angwiki and angwiktionary

This patch does the following things:

  #1: It localizes $wgSitename for angwiki and angwiktionary;
  #2: It localizes $wgMetaNamespace and $wgMetaNamespaceTalk
      for those two projects, too;
  #3: It adds four aliases without macrons and with 'ae'
      instead of 'æ' for NS_PROJECT and NS_PROJECT_TALK on
      angwiki;
  #4: It creates an 'Appendix' namespace under no. 100 and a
      relevant talk namespace under no. 101 on angwiktionary;
  #5: It adds additional aliases without macrons and with
      'ae' instead of 'æ' for those two namespaces as well as
      a macron-free alias for NS_PROJECT_TALK (five aliases
      in total).

See bug for URL with on-wiki agreement for these changes.

Bug: 56334
Change-Id: I30b7d6d209de50211a66e4869e64b2f9549f4431