code refactoring
insert animation
spendings overview, switching months
spendings get updated
improved login error checking and display on mobile devices
Merge branch 'login-improve' into develop
removing php warning
added number rounding
spendings are added to the right month, fixes #4
reworking js code
implemented missing session checks, fixing #3
parsing 2013 and 13 leads to the same result, fixes #5
new layout, loading animation
new error message style
fixed loading spendings twice
improved login page, especially for mobile devices
overall mobile improvements
Merge branch 'mobile' into develop
editing Ausgaben is now possible, fixes #2
back & forward in browser is handled correctly