statistics menu added
add new view statisticswith report of basic global activity and inactive users
add reports demographics by ages with pie chart using highcharts.js
bug solved report inactive users
add activity bank by months with chart
Merge remote-tracking branch 'timeoverflow/master' into statistics_menu_for_admin

* timeoverflow/master: (31 commits)
  Añadido post-deploy callback para rollbar.
  added rollbar exception handler
  Whoopss.... :scissors:
  Refactor.
  Whooops....
  Usa angular http y modal para los cambios de estado.
  Users helper:
  Permite a las acciones con PUT y devuelve ok si se hace en json
  Usa la función de promote en el link.
  Función 'promote', que lanza un modal de confirmación, hace la llamada y cambia el estad del usuario.
  Traducciones para usar en templates de angular
  Añadido directivas bootstrap para angular
  actions according to active/inactive user
  only list posts of active members
  inactive users only list for admins and inactive users profile marked as inactive
  activate/deactivate member with confirmation alert
  add active column to members
  correct translation promote/demote
  add link to current_organization in users index
  add new fields to views
  ...

Conflicts:
	app/views/layouts/application.html.haml
A small fix in the case where balance is null...

... and some trailing spaces removed.
Merge pull request #35 from coopdevs/statistics_menu_for_admin

Statistics menu for admin