allow accessing of plugin classes via PluginManager
removed core dependency from publish-s3
fixed link to crowdin in readme
Merge pull request #94 from webvariants/master

fixed link to crowdin in readme
do not use the mysql extension in the check_server script
replaced ext-mysql with PDO in the session handler
removed last trace of mysql_*
we want to check for a successful query, not for a pointless row count
removed unused Po_Parser library
removed backup file
moved HTMLPurifier's cache out of the library into a new /tmp directory
use Composer to fetch and load vendor libraries

This patch adds proper Composer usage, in which all the vendor/ libraries are now removed
from this repository and are fetched after cloning/pulling it. This also makes us use the
Composer-generated autoloader, so I removed a lot of manual class-loads.

To clean this up even further, we let Composer always-include the global functions (the
cost of that is virtually zero, but it frees us from having to keep track of what file to include
for what function). This killed a good chunk of other require statements.

JSMin is not maintained anymore, so we should switch to something better soon. CSSMin
is also not Composer-ready, hence the two manual package declarations.

The psr-0 loading for Slim is there because this old (but last 1.x) version of Slim has an error
in its own composer.json, which makes it unloadable.
noticed this missing handler while testing the API for Composer stuff
rebuilt Propel files and added helper for Windows systems

Using Propel 1 with Composer is a nightmare on Windows:
https://github.com/propelorm/Propel/pull/588

The small batch file works around Propel by simply directly
invoking Phing.
fixed typo
fixed XSS vulnerability

Thank god the username is truncated, which kills most of the useful stuff you could do.
Also, fixed one unrelated HTML error.
fixed delete-account button
minor improvements for the account settings
do not send email activation mails when the email address has not been altered
Merge pull request #98 from webvariants/account-settings

improved account settings