Ability to switch the coding standard from command palette

* At the moment, this would only toggle it for the during of the session, and
  not save it back to the settings file
* GH-112
Add standard switching to context menu
Bump changelog number
Remove php-cs-fixer check for switching coding standard

* https://github.com/benmatselby/sublime-phpcs/issues/112#issuecomment-39095873
Bump the changelog
If not using project settings, update top level settings

* https://github.com/benmatselby/sublime-phpcs/issues/112
Set default coding standard to PSR2
Bumped changelog for 6.4.2
Merge pull request #1 from benmatselby/master

Resync