Add getTimeFormat method
Add getTimeFormat method

DateHelper->getTimeFormat returns:
- 12 in case of 12 hour format
- 24 in case of 24 hour format


Former-commit-id: 97483dab3d3a047c76eb01669aa9aee810a1d631
mlocati/concrete5,jaromirdalecky/concrete5,KorvinSzanto/concrete5,rikzuiderlicht/concrete5,hissy/concrete5,triplei/concrete5-8,concrete5/concrete5,triplei/concrete5-8,concrete5/concrete5,rikzuiderlicht/concrete5,mainio/concrete5,MrKarlDilkington/concrete5,a3020/concrete5,jaromirdalecky/concrete5,KorvinSzanto/concrete5,MrKarlDilkington/concrete5,MrKarlDilkington/concrete5,biplobice/concrete5,KorvinSzanto/concrete5,deek87/concrete5,deek87/concrete5,acliss19xx/concrete5,concrete5/concrete5,hissy/concrete5,rikzuiderlicht/concrete5,mainio/concrete5,hissy/concrete5,olsgreen/concrete5,biplobice/concrete5,acliss19xx/concrete5,olsgreen/concrete5,mlocati/concrete5,mainio/concrete5,jaromirdalecky/concrete5,mlocati/concrete5,a3020/concrete5,concrete5/concrete5,biplobice/concrete5,hissy/concrete5,mlocati/concrete5,haeflimi/concrete5,deek87/concrete5,acliss19xx/concrete5,jaromirdalecky/concrete5,haeflimi/concrete5,deek87/concrete5,haeflimi/concrete5,olsgreen/concrete5,biplobice/concrete5,haeflimi/concrete5,triplei/concrete5-8