add gotoLocation for credocument
press Enter in Goto Dialog will goto page/location directly
use --utf8-input and --utf8-out params when calling sdcv
This will prevent string encoding conversion in Kobo in which it
has problem to doing so.
This patch should fix #252 and #272.
revert JSON hack since the unusual utf8 representation is fixed
Merge pull request #322 from chrox/master

add gotoLocation for credocument