Add the web folder as load path for the sass filter
Add the web folder as load path for the sass filter

This makes it consistent with the Scss filter.
Refs #125

symfony/AsseticBundle,symfony/assetic-bundle,symfony/assetic-bundle,symfony/AsseticBundle,symfony/AsseticBundle,symfony/assetic-bundle,jandevani/AsseticBundle,shieldo/AsseticBundle,shieldo/AsseticBundle,shieldo/AsseticBundle,taueres/AsseticBundle,jandevani/AsseticBundle,taueres/AsseticBundle,javiereguiluz/assetic-bundle,javiereguiluz/assetic-bundle,javiereguiluz/assetic-bundle,taueres/AsseticBundle,jandevani/AsseticBundle