Major code rewrite
1. Switched pic hosting from itmages.ru to imgur.com (keeps images for 6 months since last view).
2. The script now uses hosting site's API, thus the itmages.exe util is not needed anymore.
3. Added drag'n'drop files support, so that the script can upload any image files (even multiple at once) that user drag'n'dropped onto the script's file.
4. Rewrote settings section so that the script uses an external .ini to read settings from (and that ini is used only if the script is compiled).
5. Made script create that external .ini (if the script is compiled) with comments to the available options.
6. Added more settings.