Update to Couchbase Lite 1.0

CBL 1.0 is not on Cocoapods, therefore added the framework as dependency.
This seemed to miss some CBL dependencies, in order to get it working, I
also had to add FBDB pod and a weak link to /usr/lib/libz.dylib.
Probably really hacky, need to find a better way for the dependencies
Account: removed duplicate setting of account database / creating replications after signup
Example app: removed anonymous signup, needs to be tested better