Texel align text when scrolling and linear sampling
Texel align text when scrolling and linear sampling

Linear sampling used
Scrolling delta floored and 0.5 added to sample from center of texel

Change-Id: Id01b09d6be8d75a649207641083bc2046166b513

dalihub/dali-toolkit,dalihub/dali-toolkit,dalihub/dali-toolkit,dalihub/dali-toolkit