fix tests
fix tests
empty activate_token when setting a new password

when user activates his account we have to invalidate the activate token as it must not be used two times

same for lost password
show number of css rules after build

this should give designers a hint when they add too many selectors
improve assets performance: remove support for old, deprecated css  syntax
performance: don't use array_merge, that's slow
performance: Provider_AtRequires

don't use getContents as that would execute trl - we don't need that for this use case
use latest version of Sourcemaps package

contains a few performance improvements
don't use in_array for better performance
improve build events performance

add more simple cases that can be calculated without going thru generators

in teasted case this speeds up kwf build --type=events by around 30%
simplify test, try to fix travis