Merge pull request #7 from freddylimpens/master

added search for bucket files
thumbnail for bucket files
Merge branch 'master' of github.com:UnissonCo/gupserver

Conflicts:
	bucket/urls.py
	bucket/views.py
simple search of bucket files # need to create a dedicated search resource
Merge branch 'master' of https://github.com/UnissonCo/dataserver
enhanced bucketfile model (migrations !!) + basic set up to use haystack to search files