Skip page key in advanced search (#46).
Ignore the 'page' key when recreating the advanced search string
Add test to make sure the page issue is fixed, issue #46
Do not fail, when ocr backend is missing (#50).

- Since tesseract (i.e. an ocr backend) is an optional requiremnt of mayan, we
  shouldn't fail, if it is not found.
- S.a https://github.com/mayan-edms/mayan-edms/issues/50
Fix the way we try for missing binary dependencies in the installations app
Issue #50. Thanks to Ford Guo (@fordguo) for the reporting.
Don't silence OCR errors at the API high level, at this layer we don't know what really happened in the backend.
Move exception handling to the backend.
Don't silence OCR errors even if Tesseract is optional otherwise the user won't know happened.
Catch the OSError generic exception and return a friendlier "Tesseract not found" exception
Issue #51, Don't try to display the recent searches template for anonymous users.
Merge pull request #54 from fordguo/master

add the zh_CN support
Issue #49, add scrollstop event support and use it to optimize document page image loading
Remove unused variables, remove unused parent lookup, remove unused logging, remove lazy load class after loading
Change the data attribute used to avoid javascript mime warnings, remove duplicated $(this) lookup
Merge remote-tracking branch 'origin/master'
Reset the local.py settings file
Add the zh-cn locale to the process languages script