now experimentaly updates the picture every time a price changes
introduces new image being displayed, when no articel is selected
changes button layout for future changes
changes image_preview to have more information
centers preview box vertically
added new default article preview image
modified install script accordingly
added overview over last 3 prices, where available
colorizes the current price in the preview box
makes max title length in the preview box slightly larger
now saves result, when prematurely leaving update thread
fixes duplicate articles being written to the data file
dirty fixes gui problem after deleting article
now dynamically resizes the preview picture, so the longer side becomes 100px long
Merge branch 'new-layout' into development
makes get_info_for more robust
turns prices in notification to strings %.2f
replaces the button box with a toolbar
maybe fixes key error, when title is a unicode string
refixes article duplicates in the data file
makes config window not resizable
makes the code prettier
makes the main window appear in the center
makes the config window modal to the main window
rounds found price to .2