#389. Added dynamic price value round.
#389. Revenue model for dynamic prices added.
#389. Added price range type for dynamic prices, fixed minor issues.
Translation fixes

Fixed some translations
Merge pull request #513 from laterpay/feature/389_fix_respect_price_ranges

This fixes #389
#516. Added time pass render below content.
#516. Position options added in apperance tab.
#516. Added position check for time passes.
#516. Options renamed and added to install/uninstall.
#516. Changed view args storage for widgets to prevent rewriting data, added position check for purchase button.
#516. Minor clean up.
#518. Added option to show time passes on free posts.
#516 Improved copy
#516 Copy updates
fixed broken post statistic tab and SQL-Error #519
#516 Added show / hide functionality
Merge pull request #526 from laterpay/feature/516_render_time_passes_below_content

This fixes #516
#516. Now time pass widget not displayed on search page results.
#528. Additionally check preview as visitor option before granting unlimid access.
#514. Fixed time passes category select issue.