Round offset position to avoid antialiasing problem

When the position is a rounded number, some browser doesn't render the
text correctly. Rounding the offset solve the problem.
Merge pull request #46 from giuseppeaiello/master

Round offset position to avoid antialiasing problem
Update rn-carousel.js

s/find/children/
Update rn-carousel-infinite.js

s/find/children/
Update angular-carousel.css

Specify only the direct li children of the .rn-carousel-slides
grunt run
Merge pull request #52 from outofculture/master

Fix: Limit <li> effects
fix #60