unused code
optimization: cache zip file during reading
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
Merge branch 'yota2' into kindle
zip file optimization
resource file optimization
no tag lowercasing in xhtml
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
Merge branch 'yota2' into kindle
ZLUnicodeUtil::toLower() optimization: do not call java method for ascii strings
Merge branch 'master' into ice-cream-sandwich
Merge branch 'ice-cream-sandwich' into yota2
Merge branch 'yota2' into kindle