Fix codestyle
Documentation improvement
Upgrade TCPDF to 6.0.024

6.0.024 (2013-09-02)
	- Bug #826 "addEmptySignatureAppearance issue" was fixed.
Document why this can be broken
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add more UTs for PMA_server_status_monitor
remove unneeded variables
bug #3997 Error handling in case MySQL extension is missing

We can not work with Response object before loading DBI as it uses it.
Fix URL redirector in case of fatal erorrs
Fixed display of link to documentation
Merge remote-tracking branch 'origin/QA_4_0'

Conflicts:
	libraries/database_interface.lib.php
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Merge remote-tracking branch 'origin/master'
Allow local links to documentation
Merge remote-tracking branch 'origin/QA_4_0'
Update po files
Merge remote-tracking branch 'origin/QA_4_0'
Update po files
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End sentence with comma