[TYPO3-piwik] Fatal Error in Module and Extension Manager settings

[Tizian Schmidlin]

PHP 5.2.6
piwikintegration  	2.3.2
TYPO3 4.3.2

When Updating in Extension manager settings:
----
Fatal error: tx_piwikintegration_helper::require_once() 
[function.require]: Failed opening required 
'/var/www/domains/xxxx/typo3conf/piwik/piwik//core/Loader.php' 
(include_path='/var/www/domains/xxxx/typo3conf/piwik/piwik/:/var/www/domains/xxxx/typo3conf/piwik/piwik//libs/:/var/www/domains/xxxx/typo3conf/piwik/piwik//plugins/:/var/www/domains/xxxx/typo3conf/piwik/piwik//core/:/var/www/domains/xxxx/typo3conf/piwik/piwik//core:/var/www/domains/xxxx/typo3conf/piwik/piwik//libs:/var/www/domains/xxxx/typo3conf/piwik/piwik//plugins:.:/usr/share/php:/usr/share/pear') 
in 
/var/www/domains/xxxx/typo3conf/ext/piwikintegration/class.tx_piwikintegration_helper.php 
on line 62


When opening the module:
----
Fatal error: Call to undefined function showMessage() in 
/var/www/domains/xxxx/typo3conf/ext/piwikintegration/class.tx_piwikintegration_helper.php 
on line 599

With 2.3.1 it is seemed to work but it appeared to just have another error.

Finally I figured out, that piwik needs to be installed in 
typo3conf/piwik/piwik (it's hardcoded in 
class.tx_piwikintegration_helper.php).

It was a guess of me, that piwik needs to be installed for that this 
works, but it isn't written anywhere. Could you please add a big notice 
to the documentation that species that you *first* have to install piwik 
and then implement the module? This would be very nice.

Have a nice day

Greets

Tizian