Wrap the no posts message & add heading

Applies the a div with a `wrap` class around the content so its margins and padding is inline with the design.
Added robots.txt to .gitignore
Merge pull request #597 from f3ndot/patch-2

Fix the padding/margin of the message displayed when no posts are written
Merge pull request #601 from acarbonaro/master

Added robots.txt to .gitignore
fix #586 Incorrect timezones

    As explained in #586 the time fractions are rounded up (5.30 becomes
    6).
    Also another issue was that some timezones appeared multiple times.

    The rounding issue was solved by adding the precision argument to
    the round function.
    The reason why some zones where multiplicated was that
    listAbbreviations method is returning all historical configurations
    for each timezone. Thus, for iteration we are using the listIdentifiers method
    that returns an array of all timezones and for correct offset data
    we are basing on the DateTime object getOffset method.

    Instead of 1176 timezones we now have only 552 timezones (the
    correct number).
    The timezones that include fraction of times are displayed
    correctly.
removing unused variable
Update categories.php

Corrected errors
Corrected grammatical/logic errors

Some sentences were not the Italian translation of the English ones
Corrected grammatical/logic errors
Corrected grammatical/logic errors
Corrected grammatical/logic errors
Corrected grammatical/logic errors
Update posts.php
Corrected grammatical/logic errors
Correct "draft hole"

Make posts targeted as 'draft' inaccessible from the front website, even if you know the post's slug
fixing category pagination url
furthering language support
Update edit.php
Update edit.php
Add Chosen to Anchor installation select fields.