save changes.
update IDocumentModel interface
check text in OnyxTtsSpeaker.startTts()
adjust OnyxTtsSpeaker
Merge pull request #43 from dxwts/master

优化OnyxTtsSpeaker类
extract DialogReaderMenu.IReaderMenuHandler out as standalone interface
rename OnyxDialogBase -> DialogBaseOnyx
move AnnotationItem from com.onyx.android.sdk.ui.dialog to com.onyx.android.sdk.ui.dialog.data
exchange more and refresh button in reader menu dialog
modify font selecte button background
refactoring DialogReaderMenu: if 1-level menu is missing, use 2-level menu as candicate
add DialogReaderMenu.enterDJVUModeUI() to treat DJVU as special case of reader menu dialog
add comments
update DialogReaderMenu.enterDJVUModeUI()
Merge pull request #44 from dxwts/master

回归主干