Metadata.db download works again
removed DEVELOPMENT constant
removed db logging in debug mode (too, noisy, to less information)
code refactoring url_for_other_page
feed languge set to en-EN
update status shos local time instead of UTC
Error handling (back to index page) in case of gdrive authenticate aborted
Mistyping page register fixed
Mistyping bokk fixed
Added uploaded books to tasklist (#442)
Error handling for failed file update added
Code refactoring worker thread
Tasks now never show any decimal values
Converter function unified
removed shell from subprocess call
preparation for limiting domain for registering emails
Book series can now increased in 0.1 steps (#562)
Accordion panels in config are now usable on touch devices like iPad (#545)
Gdrive authenticate button only visible after logged in (#525)
Fixed misstyping in german translation
* Add buttons to show/hide results from Douban & Google
* Trigger search with "Enter" key
* Use Underscore.js template instead of build HTML strings in JavaScript
* Keep click event handler in JavaScript instead of using HTML's `onclick`
* Normalize Douban & Google results
* Update cover image & add cover URL to the form input
Added ability to reload database connection (refresh problem)
Bugfix display hot books (no hot books, hot books are deleted books, no longer result in error 500)
