Remove general settings in .editorconfig.

Upon further discussion, setting stuff like indents, line endings,
encoding, etc... for every file might not be such a good idea:  We might
have fixture files in a project that uses different encoding (and maybe
code, tests for instance, that depend on it!),  it might act
wrongly when code files in a non-configured language are added, and so
on.
Therefor, we remove the settings for all files entirely.
And add some likely languages like Python and Ruby to the mix.
Show blog image on revision previews
Merge pull request #761 from jessedobbelaere/blog-no-image-revision-fix

Blog - show blog image on revision previews - fixes #760
/src/Backend/Cronjob is it
Extensions Locale Fixed
Added every var on new line
Locale fixed
Merge pull request #763 from jeroendesloovere/bugfix-extensions-cronjobs-url

Bugfix extensions cronjobs url
Bugfix for checking existence of theme
Changelog updated
'Core' should remain 'core'
Merge pull request #765 from jeroendesloovere/bugfix-install-theme

Fixes installing a theme
Fix merge conflict in changelog

Please enter the commit message for your changes. Lines starting
Merge branch 'jeroendesloovere-bugfix-pages-previous-next'
Use Core instead off core
Merge branch 'jeroendesloovere-bugfix-core-theme'
Merge branch 'master' into multisite