synchronization with beta branch
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
synchronization with beta branch
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
code simplification
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2