Merge pull request #816 from chrox/master

fix making of local package in OTA for Kobo
Create a simplified database file out of the calibre file

Makes searches WAY 100 times faster.
From the second run on.
Update filemanagermenu.lua
Code cosmetics
Default Settings finally also with the array fields
Merge pull request #817 from WS64/master

Create a simplified database file out of the calibre file
remove rescaleByDPI since it's not reversible
alternatively we store the original size before scaling by screen DPI
and use that value when needed.
enable Wikipedia support
Since wikipedia server is language specific we should first detect
language of the text by querying Google Translate. Make sure you have
access to both Google Translate and Wikipedia service to use this
function.
fix tap on word title will crash koreader
long press the backspace key will clear input text