Merge pull request koreader#586 from hwhw/l10n

Added a pure Lua gettext implementation.
Tested and working.

The translations are rather lacking, though!

Merge pull request koreader#584 from chrox/master

remove full screen option in koptoption

Merge pull request koreader#583 from chrox/master

enlarge touch zone for readerfooter

Merge pull request koreader#582 from houqp/houqp-master

feat(gettext): update koreader-base to use embedded gettext lib

Merge pull request koreader#581 from chrox/master

don't clip page images when text is available

Merge pull request koreader#579 from chrox/master

export highlighted rect in scanned page to Evernote

Merge pull request koreader#573 from chrox/platform

reorganize launching scripts for both kindle and kobo platforms

Merge pull request koreader#568 from chrox/master

show a box indicator when tapping on a link

Merge pull request koreader#564 from chrox/master

use built-in LuaJIT profiler instead of lulip

Merge pull request koreader#557 from chrox/master

update koreader-base