Kranitor #1: On-boarding

'''Kranitor commits''' are commits by Krinkle with his janitor hat on.
Must never contain functional changes mixed with miscellaneous changes.

.gitignore:
 * Add .DS_Store to the ignore list so that browsing the directories
   on Mac OS X, will not add these files to the list of untracked
   files.
 * Fix missing newline at end of file

.jshintrc
 * raises -> throws
 * +module (QUnit.module)
 * remove 'Node' (as of node-jshint 1.7.2 this is now part of
   'browser:true', as it should be)

Authors:
 * Adding myself

MWExtension/VisualEditor.php
 * Fix default value of wgVisualEditorParsoidURL to not
   point to the experimental instance in WMF Labs.

Issues:
 * ve.ce.TextNode:
  - Fix TODO: Don't perform a useless clone of an already-jQuerified object.
  - Use .html() to set html content instead of encapsulating between
    two strings. This is slightly faster but more importantly safer,
    and prevents situations where the resulting jQuery collection
    actually contains 2 elements instead of 1, thus messing up
    what .contents() is iterating over.
 * ve.ce.Document.test.js
  - Fix: ReferenceError: assert is not defined
 * ve.dm.Document.test.js
  - Fix: ReferenceError: assert is not defined
 * ve.dm.Transaction.test.js
  - Fix: ReferenceError: assert is not defined
 * ve.dm.TransactionProcessor.test.js
  - Fix: ReferenceError: assert is not defined
 * ext.visualEditor.viewPageTarget
  - Missing dependency on 'mediawiki.Title'

Code conventions / Misc cleanup
 * Various JSHint warnings.
 * Whitespace
 * jQuery(): Use '<tag>' for element creation,
   use '<valid><xml/></valid>' for parsing
 * Use the default operator instead of ternary when the condition and
   first value are the same.
   x = foo ? foo : bar; -> x = foo || bar;
   Because contrary to some programming language (PHP...), in JS the
   default operator does not enforce a boolean result but returns the
   original value, hence it being called the 'default' operator, as
   opposed to the 'or' operator.
 * No need to call addClass() twice, it takes a space-separated list
   (jQuery splits by space and adds if needed)
 * Use .on( event[, selector], fn ) instead of the deprecated
   routers to it such as .bind(), .delegate() and .live().
   All these three are now built-in and fully compatible with .on()
 * Add 'XXX:' comments for suspicious code that I don't want to change
   as part of a clean up commit.
 * Remove unused variables (several var x = this; where x was not
   used anywhere, possibly from boilerplate copy/paste)
 * Follows-up Trevor's commit that converts test suites to the new
   QUnit format. Also removed the globals since we no longer use those
   any more.

Change-Id: I7e37c9bff812e371c7f65a6fd85d9e2af3e0a22f