Fix deployment. Add fabfile for CentOS.
Merge remote-tracking branch 'ipeirotis/master'
Fix requirements.
Fix nginx configuration.
Remove postgres initialization from install script.
Uncomment solr, ssh provision.
Fix django-tastypie version.

Not compatible with mtracker code:
django-tastypie==0.9.14
django-pipeline>=1.2.0
Add default command to manage.py wrapper script.
Fix authentication bug.
Fix typo.
Apply suggestions from comments.
Merge pull request #3 from borysiam/master

Migration and auth bug fix.