use Database-Transactions
added protection against multiple transaction-starts
added function documentation
transaction-support for PostgreSQL added
tidier implementation + bugfix
each request should be a transaction
Transaction functions throw dbExceptions now
committing a Transaction is done now within try-block
copy and paste errors corrected
begin_transaction in mysqli started in php5.5 - alternative implemented
another typo
Move beginTransaction
Merge pull request #1 from mattab/patch-1

Move beginTransaction
rename variable according coding standard
secure transactions against nesting
reverted Pgsql.php to old state ( unsupported )
fix missing paranthesis
Refactor visitor recognition in his own class, so that a third party plugin could reuse it.
IsVisitorKnow() wasn't support, this commit fixes the bug.
Fix typo
refs #5212 improved left menu stylesheet which works better with Morpheus now, turned it into a plugin and made it configurable. not finished yet
refs #5212 added possibility to make a system setting readable for non super users