Sorting of contenttype in backend

Patch suggested by trigau in #948
Err on the side of caution and compatiblity for & vs &amp;
Bump version for good practise
Partially revert 9534de3.

Was throwing nasty “Fatal error: Uncaught exception 'RuntimeException'
with message 'Accessed request service outside of request scope. Try
moving that call to a before handler or controller.' in
<bolt_install_dir>/vendor/silex/silex/src/Silex/Application.php on line
141” errors.
Bumping version numver to "1.6.0 beta 2"
Adding an 'isset' for REMOTE_ADDR.
Merge pull request #1128 from GawainLynch/hotfix/Socialite

Err on the side of caution and compatibility for & vs &amp;
Merge pull request #1127 from rarila/patch-1

Sorting of contenttype in backend
Fixed: main menu should reflect actual user permissions
Bumping version to 1.6.0 RC
add html lang attribute, so browsers can properly recognire the content's language (like google chrome and it's translator)
Updating base-2014 theme.
jquery-ui datepicker locales. add locale js only if locale file exists to avoid 404 errors
use localdate instead of date in content edit
Bugfix in editcontent.twig

datepublish and datedepublish was scramled
Setting $app variable to protected, which may be useful for 0c18498c
Merge pull request #1137 from xiaohutai/master

Setting $app variable to protected, which may be useful for 0c18498c
Merge branch 'multilang' of github.com:ntomka/bolt into ntomka-multilang
Updating Dutch language file.
Fixing trailing space in a label.