Use real color for collapsed menu button. Change icon classes for fa ones
New logos
Merge branch 'master' of https://github.com/PyBossa/pybossa-default-theme

* 'master' of https://github.com/PyBossa/pybossa-default-theme:
  New logos
Fixed padding
Merge branch 'master' into issue-bootstrap3

* master:
  New logos

Conflicts:
	templates/_footer.html