gems upgrade, including Rails 4.1.0
fixed comma/dot conversion in expenses
updated from bootstrap's modal window to Magnific Popup
Merge branch 'feature/newmodalwindowlib' into develop

* feature/newmodalwindowlib:
  updated from bootstrap's modal window to Magnific Popup
  fixed comma/dot conversion in expenses
update to 2.4.0
Merge branch 'release/2.4.0'

* release/2.4.0:
  update to 2.4.0
  updated from bootstrap's modal window to Magnific Popup
  fixed comma/dot conversion in expenses