Merge pull request koreader#1819 from apletnev/statistics_fix

fix error in case when process old statistics files

Merge pull request koreader#1806 from apletnev/koreader#1710

koreader#1710 FR: Add support of statistics plugin for pdf

Merge pull request koreader#1727 from apletnev/koreader#1723

koreader#1723 Add time to read into the status bar

v2015.11-stable

koreader-stable-v2015.11

Merge pull request koreader#1696 from chrox/fix_flush_settings

fix FlushSettings event consumed by statistics plugin

Merge pull request koreader#1684 from chrox/fix_kobo_touch_probe

fix kobo touch probe

Merge pull request koreader#1667 from chrox/fixes_for_stable_release

add support for password protected zip/cbz documents

Merge pull request koreader#1662 from chrox/fixes_for_stable_release

Fixes for stable release

Merge pull request koreader#1639 from chrox/fix_travis

fix unit test fail on Travis