minor #100 Fixing TrueFilter example (aik099)
minor #100 Fixing TrueFilter example (aik099)

This PR was squashed before being merged into the 2.0-dev branch (closes #100).

Discussion
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Fixing TrueFilter example

In the config file $this doesn't represent Sami instance and will lead to Fatal Error.

The syntax highlighting was also fixed in the example code.

Commits
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042226b Fixing TrueFilter example

TobyMaxham/Sami,edos-io/Sami,php-opencloud/Sami,laborautonomo/Sami,php-opencloud/Sami,forging2012/Sami,scribenet/Sami,TiS/Sami,forging2012/Sami,jeskew/Sami,FriendsOfPHP/Sami,derFunk/Sami,jeskew/Sami,FriendsOfPHP/Sami,scribenet/Sami,TiS/Sami,TobyMaxham/Sami,derFunk/Sami,edos-io/Sami