[merb-haml] Handle case when sass template_location is a hash
[merb-haml] Handle case when sass template_location is a hash

Allows for multiple mappings instead of just a string location
merb/merb,wycats/merb,wycats/merb,wycats/merb,wycats/merb,wycats/merb,merb/merb,merb/merb