Update index.php

$post_title string gets the same treatment as in Home Page to avoid inconsistencies (ie. character substitution) between titles in posts list and the single post page.
no caching if user is logged in
Fix a bug with Dropplets running on an alternate port.
Validate better the condition.
More Templates
Fix wrong description on line 315.
Merge pull request #226 from rubenvarela/fix_line_315

Documentation: Fix wrong description on line 315.
Merge pull request #203 from franrosa/master

Update index.php
Merge pull request #216 from lukas-bold/patch-1

no caching if user is logged in
Fixing issue 227: re-defining '' in count_premium_templates() to prevent page break
Merge pull request #228 from jsit/master

Fixing issue 227: re-defining '$templates' in count_premium_templates()
Merge pull request #224 from rubenvarela/port_bug

Alternate Port bug
The Dropplets Font
The Marketplace Now Powered by Gumroad
Proper Caching for Profile Images
Fixed the relative path that broke images on the /category page.
Updating GitIgnore
Fixed the relative path that broke images on the /category page.

Exactly the same as the commit 12f50aefd515a3effb4529b28cb9ea3ac0ebaa6a
Support for special characters such as tildes.

Thanks to peterrovid for the hint!! https://github.com/circa75/dropplets/issues/156#issuecomment-24741823
ignore all template folders except the default one