raise error message when network is unavailable
Merge pull request #209 from chrox/master

raise error message when network is unavailable
fix floating punctuations rendered outside of text frame for some fonts like Droid Sans Fallback
Merge pull request #210 from chrox/master

fix floating punctuations rendered outside of text frame
remove reginal update parameters for android
Merge pull request #211 from chrox/master

remove reginal update parameters for android
add zsync for OTA update
Merge pull request #212 from chrox/master

add zsync for OTA update