[gxml/serialization] (24 commits) ...Merge remote-tracking branch 'origin/master' into serialization

[Daniel Espinosa Ortiz <despinosa src gnome org>]

Summary of changes:

  468825c... libxml-2.0.vapi: improve XmlError, provide get_last_error m (*)
  2d3bdd9... Attr.vala: rearrange description (*)
  e19f60f... gxml/*.vala: update docs, markup special values, type links (*)
  24e2519... CharacterData,Implementation,Node.vala: change protected fu (*)
  8f0919c... glib-2.0.vapi: get rid of trailing whitespace (*)
  002b873... Error.vala: Add GXml.Error errordomain, for actual exceptio (*)
  a539954... Makefile.am: compile Error.vala (*)
  25cbe6b... Document.vala: add GXml.Error to Document.from_path, use Xm (*)
  fe761d0... Document.vala: add error handling to IO operations (*)
  e9bfab4... README: add guidance for documentation (*)
  3370288... gxml/*.vala: add a linebreak between Version and URL; sadly (*)
  b94ae2d... gxml/*.vala: fix examples in comments regarding line breaki (*)
  cfbcdb4... Document.vala: improve documentation significantly, describ (*)
  b804ea0... Element.vala: improve documentation by removing unnecessary (*)
  56069a1... Error.vala: add WRITER errorcode (*)
  27d6c05... gxml/*.vala: remove unnecessary periods (*)
  a094ff7... Document.vala: add more error reporting (*)
  bf0986b... DocumentTest.vala: test error handling for doc save and loa (*)
  f46ca9e... DomException: add X_OTHER for a generic error code that's n (*)
  4979099... GXmlTest.vala: add an error check for our boilerplate get_d (*)
  c3b7d34... Document.vala: use error messages from libxml2 (*)
  d73e348... NodeList.vala: touch a comment (*)
  7d0fc9a... libxml-2.0.vapi: add Xml.Error.get_last_error (xmlGetLastEr (*)
  c9e9252... Merge remote-tracking branch 'origin/master' into serializa

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