updated CHANGELOG.md
Merge commit '9d3202b8718b43323438ec72c11186eed23f0cb0'

Conflicts:
	CHANGELOG.md
fixed changelog snafu
Merge pull request #205 from pweisenburger/master

Hide "Update library" menu item if the current backend is not connectable
Revert "hide "Update library" menu item if the current backend is not connectable"

This reverts commit 666fa7187ef70237fb0ce9ca55ed8cd5a20e5ff4.
factor out the checkBackendConnectivity filter to a class so it can be reused
use the backend connectivity filter for backend/updateLibrary, otherwise we'll
get a slightly cryptic error message instead of the friendly "the backend is
not connectable".
fixed an error in the last commit (CFilter doesn't have a method named redirect)