When selecting a core donor country and op unit, only show projects from that country (and not all UNDP core)
Calculates numbers for donor country projects that are in core
Filter sidebar numbers according to other facets
When selecting a core donor country and op unit, only show projects from that country (and not all UNDP core)
Calculates numbers for donor country projects that are in core
Filter sidebar numbers according to other facets
Add inline documentation
Merge branch 'sidebar-fixes' of github.com:undp/undp.github.com into sidebar-fixes

* 'sidebar-fixes' of github.com:undp/undp.github.com:
  Filter sidebar numbers according to other facets
  Calculates numbers for donor country projects that are in core
  When selecting a core donor country and op unit, only show projects from that country (and not all UNDP core)

Conflicts:
	_includes/collections.js
	_includes/routers/Router.js
Merge pull request #83 from undp/sidebar-fixes

Sidebar fixes