Fix a bug when scrollview has content inset top 0 #7

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mplulu wants to merge 3 commits intocoolbeet:masterfrom

Commits on Nov 19, 2014

fix a bug cause when scrollview with content inset top 0 will cause the refresh control to use the inset after the animation init to set as the original content inset.
mplulu
committed
respect line width when create bar item by shift the x, y half of line width, to prevent it from clipping
mplulu
committed
Merge branch 'respect-line-width'
mplulu
committed