Pinned assetic lib version to 1.1.x

This is because of the bug described here:
https://github.com/symfony/AsseticBundle/pull/200
If things are fixed, this pinning could be removed. Anyway, using
distict library versions is better for reproducing bugs. IMHO it is
better to leave it pinned.
Moved the compass path out of the config.

Having a pre-configured compass path without the option to override
it ... sucks (sorry). Assetic already offers the assetic.filtername.bin
parameters, so why not use them?
Merge branch 'feature/Pin-Assetic-Because-Of-Interface-Change' into develop
Added missing user variable.
Added variable type hints, works in PHPStorm, Eclipse, Zend Studio and Netbeans.
Changed deprecated bind calls to submit.
Merge branch 'feature/remove-deprecations' into develop