spaminator: load progress_bar only on development
ldap: create install file
stoa: use mock instead of fake db on test
plugins-infra: add infra support to core extensions

The core extensions now should be created inside the folder lib/ext.
They will automatically loaded, so no need for the requires on the
plugin class definition file.

Further information on how to use this feature here:
http://noosfero.org/Development/PluginsArchitecture#Extending_core_classes
solr: implement install file
solr: enable solr to run its features tests
solr: fix attribute name on step definition
solr: fix scenario on search_enterprises test
solr: avoiding solr install since there are still tests failing
search_communities_feature: fix test
short_filename_feature: fix test
send_email: fix features tests
tests: avoid randomness on article test
Bumping version 0.44.4
Updating AUTHORS file
Merge branch 'stable' of git://gitorious.org/noosfero/noosfero into travis