update app.php to reflect silex service provider syntax change
merged branch tamcy/master (PR #42)

This PR was merged into the master branch.

Commits
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e4ad63d update app.php to reflect silex service provider syntax change

Discussion
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Fix assetic initialization code

The assetic initialization code has been changed after the rename from AsseticExtension to AsseticServiceProvider.

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by tamcy at 2013-04-12T09:36:03Z

The new service provider constructor now ignores the 'assetic.filters' and 'assetic.assets' keys, so they are of no use. Assetic will not compile the less and js files as they are not added to the asset manager at all. This commit modifies the initialization code using the new syntax to restore Assetic's functionality.
Fix previous merge