Merge pull request koreader#894 from chrox/fix_872

fix koreader#872

Merge pull request koreader#890 from chrox/fix_772

fix koreader#772

Merge pull request koreader#867 from chrox/fix_863

register opened document in documentregistry

Merge pull request koreader#862 from chrox/fix_858

don't share info field in document

Merge pull request koreader#855 from WS64/master

Only use registered file types in search

Merge pull request koreader#836 from chrox/fix_835

fix koreader#835

Merge pull request koreader#829 from chrox/master

markup annotation quadpoints should be defined in counterclockwise

Merge pull request koreader#823 from chrox/master

disable string collating in Kobo devices

Merge pull request koreader#817 from WS64/master

Create a simplified database file out of the calibre file

Merge pull request koreader#792 from chrox/master

rebase crengine with sourceforge upstream